Swan Lake is generally presented in either four acts, four scenes (primarily outside Russia and Eastern Europe) or three acts, four scenes (primarily in Russia and Eastern Europe). The biggest difference of productions all over the world is that the ending, originally tragic, is now sometimes altered to a happy ending.
Prologue
Some productions include a prologue that shows how Odette first meets Rothbart, who turns Odette into a swan.
Act 1
A magnificent park before a palace
[Scène: Allegro giusto] Prince Siegfried is celebrating his birthday with his tutor, friends and peasants [Waltz]. The revelries are interrupted by Siegfried's mother, the Queen [Scène: Allegro moderato], who is concerned about her son's carefree lifestyle. She tells him that he must choose a bride at the royal ball the following evening (some productions include the presentation of some possible candidates). Siegfried is upset that he cannot marry for love. His friend Benno and the tutor try to lift his troubled mood. As evening falls [Sujet], Benno sees a flock of swans flying overhead and suggests they go on a hunt [Finale I]. Siegfried and his friends take their crossbows and set off in pursuit of the swans.
Act 2
A lakeside clearing in a forest by the ruins of a chapel. A moonlit night.
Siegfried has become separated from his friends. He arrives at the lakeside clearing, just as a flock of swans land [Scène. Moderato]. He aims his crossbow [Scène. Allegro moderato], but freezes when one of them transforms into a beautiful maiden, Odette [Scène. Moderato]. At first, she is terrified of Siegfried. When he promises not to harm her, she explains she and her companions are victims of a spell cast by the evil owl-like sorcerer Rothbart. By day they are turned into swans and only at night, by the side of the enchanted lake – created from the tears of Odette's mother – do they return to human form. The spell can only be broken if one who has never loved before swears to love Odette forever. Rothbart suddenly appears [Scène. Allegro vivo]. Siegfried threatens to kill him but Odette intercedes – if Rothbart dies before the spell is broken, it can never be undone.
As Rothbart disappears, the swan maidens fill the clearing [Scène: Allegro, Moderato assai quasi andante]. Siegfried breaks his crossbow, and sets about winning Odette's trust as the two fall in love. But as dawn arrives, the evil spell draws Odette and her companions back to the lake and they are turned into swans again.
Act 3
An opulent hall in the palace
Guests arrive at the palace for a costume ball. Six princesses are presented to the prince [Entrance of the Guests and Waltz], as candidates for marriage. Rothbart arrives in disguise [Scène: Allegro, Allegro giusto] with his daughter, Odile, who is transformed to look like Odette. Though the princesses try to attract the prince with their dances [Pas de six], Siegfried has eyes only for Odile. [Scène: Allegro, Tempo di valse, Allegro vivo] Odette appears (usually at the castle window) and attempts to warn Siegfried, but he does not see her. He then proclaims to the court that he will marry "Odette" (Odile) before Rothbart shows him a magical vision of Odette. Grief-stricken and realizing his mistake, Siegfried hurries back to the lake.
Act 4
By the lakeside
Odette is distraught. The swan-maidens try to comfort her. Siegfried returns to the lake and makes a passionate apology. She forgives him, but his betrayal cannot be undone. Rather than remain a swan forever, Odette chooses to die. Siegfried chooses to die with her and they leap into the lake. This breaks Rothbart's spell over the swan maidens, causing him to lose his power over them and he dies. In an apotheosis, the swan maidens watch as Siegfried and Odette ascend into the Heavens together, forever united in love.
1877 libretto synopsis
Act 1: Prince Siegfried, his friends, and a group of peasants are celebrating the Prince's coming of age. Siegfried's mother arrives to inform him that she wishes for him to marry soon so that she may make sure that he does not disgrace their family line by his marriage. She has organised a ball where Siegfried is to choose his bride from among the daughters of the nobility. After the celebration, Siegfried and his friend, Benno, spot a flock of flying swans and decide to hunt them.
Act 2: Siegfried and Benno track the swans to a lake, but they vanish. A woman wearing a crown appears and meets the two men. She tells them that her name is Odette and she was one of the swans they were hunting. She tells them her story: Odette's mother, a good fairy, had married a knight, but she died and the knight remarried. Odette's stepmother was a witch who wanted to kill her, but her grandfather saved her. Odette's grandfather had cried so much over the death of Odette's mother that he created the lake with his tears. Odette and her companions live in the lake with Odette's grandfather, and can transform themselves into swans whenever they wish. Odette's stepmother still wants to kill her, and stalks her in the form of an owl, but Odette has a crown which protects her from harm. When Odette gets married, the witch will lose the power to harm her. Siegfried falls in love with Odette but Odette fears that the witch will ruin their happiness.
Act 3: Several young noblewomen dance at Siegfried's ball, but the Prince refuses to marry any of them. Baron von Rothbart and his daughter, Odile, arrive. Siegfried thinks that Odile looks like Odette, but Benno doesn't agree. Siegfried dances with Odile as he grows more and more enamored with her, and eventually agrees to marry her. At that moment, Rothbart transforms into a demon, Odile laughs, and a white swan wearing a crown appears in the window. The Prince runs out of the castle.
Act 4: In tears, Odette tells her friends that Siegfried did not keep his vow of love. Seeing that Siegfried is coming, Odette's friends leave and urge her to go with them, but Odette wants to see Siegfried one last time. A storm begins. Siegfried enters and begs Odette for forgiveness. Odette refuses and attempts to leave. Siegfried snatches the crown from her head and throws it in the lake, saying "Willing or unwilling, you will always remain with me!" The owl flies overhead, carrying away the crown. "What have you done? I am dying!" Odette says, and falls into Siegfried's arms. The lake rises from the storm and drowns Odette and Siegfried. The storm quiets, and a group of swans appears on the lake.
Alternative endings
Many different endings exist, ranging from romantic to tragic.
In 1950, Konstantin Sergeyev staged a new Swan Lake for the Mariinsky Ballet (then the Kirov) after Petipa and Ivanov, but included some bits of Vaganova and Gorsky. Under the Soviet regime, the tragic ending was replaced with a happy one, so that in the Mariinsky and Bolshoi versions, Odette and Siegfried lived happily ever after.
In the version danced today by the Mariinsky Ballet, the ending is one of a "happily ever after" in which Siegfried fights Rothbart and tears off his wing, killing him. Odette is restored to human form and she and Siegfried are happily united. This version has often been used by Russian and Chinese ballet companies. A similar ending was used in The Swan Princess.
In the 1986 version Rudolf Nureyev choreographed for the Paris Opera Ballet, Rothbart fights with Siegfried, who is overcome and dies, leaving Rothbart to take Odette triumphantly up to the heavens.
In a version which has an ending very close to the 1895 Mariinsky revival, danced by American Ballet Theatre in 2005, Siegfried's mistaken pledge of fidelity to Odile consigns Odette to remain a swan forever. After realizing that her last moment of humanity is at hand, Odette commits suicide by throwing herself into the lake. The Prince does so as well. This act of sacrifice and love breaks Rothbart's power, and he is destroyed. In the final tableau, the lovers are seen rising together to heaven in apotheosis.
In a version danced by New York City Ballet in 2006 (with choreography by Peter Martins after Lev Ivanov, Marius Petipa, and George Balanchine), the Prince's declaration that he wishes to marry Odile constitutes a betrayal that condemns Odette to remain a swan forever. Odette is called away into swan form, and Siegfried is left alone in grief as the curtain falls.
In the 2006 version by Stanton Welch for Houston Ballet, also based upon Petipa and Ivanov, the last scene has Prince Siegfried attempting to kill Rothbart with his crossbow, missing and hitting Odette instead. Odette falls, Rothbart's spell now broken, and regains human form. The Prince embraces her as she dies, then carries her lifeless body into the lake, where he also drowns himself.
In a version danced by San Francisco Ballet in 2009, Siegfried and Odette throw themselves into the lake, as in the 1895 Mariinsky revival, and Rothbart is destroyed. Two swans, implied to be the lovers, are then seen flying past the Moon.
In a version danced by National Ballet of Canada in 2010, Odette forgives Siegfried for his betrayal and the promise of reconciliation shines momentarily before Rothbart summons forth a violent storm. Rothbart and Siegfried struggle. When the storm subsides, Odette is left alone to mourn the dead Siegfried.
In the 2012 version performed at Blackpool Grand Theatre by the Russian State Ballet of Siberia the Prince drags Rothbart into the lake and both drown. Odette is left as a swan.
In the 2015 English National Ballet version My First Swan Lake, specifically recreated for young children, the power of Siegfried and Odette's love enables the other swans to rise up and defeat Rothbart, who falls to his death. This breaks the curse, and Siegfried and Odette live happily ever after. This is like the Mariinsky Ballet's "Happily ever after" endings. In a new production in 2018, Odile helps Siegfried and Odette in the end. Rotbart, who is not the father, but Odile's brother in this production, is forgiven and he gives up his evil power. Odette and Siegfried live happily ever after and stay friends with Rotbart and Odile. This is actually the only Swan Lake production that grants a peaceful solution and a happily ever after even for the characters Odile and Rotbart.
In Hübbe and Schandorff's 2015 and 2016 Royal Danish Ballet production, Siegfried is forced by Rothbart to marry his daughter, after condemning Odette to her curse as a swan forever by mistakenly professing his love to Odile.

Time: Baroque
Place: Europe
Prologue (The Christening)
King Florestan XXIV and his Queen have welcomed their first child, Princess Aurora, and declare a grand christening ceremony to honor her. Six fairies are invited to the ceremony to bestow gifts on the child. Each fairy brings a gift of a virtue or positive trait, such as beauty, courage, sweetness, musical talent, and mischief. The most powerful fairy, the Lilac Fairy, arrives with her entourage, but before she can bestow her gift, the evil fairy Carabosse arrives with her minions. Carabosse furiously asks the King and Queen why she had not received an invitation to the christening. The blame falls on Catalabutte, the Master of Ceremonies who was in charge of the guest list. Carabosse gleefully tears his wig off and beats him with her staff, before placing a curse upon the baby princess as revenge: Aurora will indeed grow up to be a beautiful, healthy, delightful young lady, but on her sixteenth birthday she will prick her finger on a spindle and die. The King and Queen are horrified and beg Carabosse for mercy, but she shows none. However, the Lilac Fairy intervenes. Though she does not have enough power to completely undo the curse, she alters it, allowing the spindle to cause a peaceful 100-year sleep for the princess, rather than death. At the end of those 100 years, she will be woken by the kiss of a handsome prince. Relieved that Aurora's life will ultimately be spared, the court is set at ease.
Act I (The Spell)
It is the day of Princess Aurora's sixteenth birthday. Celebrations are underway, though the King is still unsettled by Carabosse's omen. The master of ceremonies discovers several peasant ladies frolicking about with knitting needles and alerts the King, who initially sentences the women to a harsh punishment. The Queen gently persuades him to spare the innocent citizens, and he agrees. An elaborate waltz is performed and Princess Aurora arrives. She is introduced to four suitors by her doting parents. Aurora and the suitors perform the famous Rose Adagio. Presently, a cloaked stranger appears and offers a gift to the princess: a spindle. Having never seen one before, Aurora curiously examines the strange object as her parents desperately try to intervene. As predicted, she pricks her finger. While initially appearing to recover quickly, she falls into a swoon and collapses. The cloaked stranger reveals herself to be Carabosse, who believes that her curse still stands and that the princess is dead. Once again, the Lilac Fairy quells the hubbub and reminds the King and Queen that Aurora is merely asleep. The princess is carried off to bed, and the Lilac Fairy casts a spell of slumber over the entire kingdom, which will only be broken when Aurora awakens. A thick layer of thorny plants grows over the palace, hiding it from view.
Act II (The Vision)
One hundred years later, Prince Désiré is attending a hunting party. Though his companions are lighthearted, the prince is unhappy and eventually asks to be left alone. On his own in the forest, he is met by the Lilac Fairy, who has chosen him to awaken Aurora. She shows him a vision of the beautiful princess, and the prince is immediately smitten. The Lilac Fairy explains the situation, and Désiré begs to be taken to the princess. The Lilac Fairy takes him to the hidden castle. Carabosse makes one last attempt to cement her vengeful curse, but the Lilac Fairy and the prince manage to defeat her together at last. Once inside the castle, Désiré awakens Aurora with a kiss. The rest of the court wakes as well, and the King and Queen heartily approve when the prince proposes marriage and the princess accepts.
Act III (The Wedding)
The royal wedding is under way. Guests include the Jewel Fairies: Diamond, Gold, Silver and Sapphire, and of course the Lilac Fairy. Fairytale characters are in attendance, including Puss in Boots and The White Cat, Princess Florine and the Bluebird, and others. Aurora and Désiré perform a grand Pas de Deux, and the entire ensemble dances. The prince and princess are married, with the Lilac Fairy blessing the union.

Prologue
Don Quixote's Study
Bachelor Sanson Carrasco is seen covering a bookcase with wallpaper, while Antonina is putting some rusty old armour and a helmet made of pasteboard into a cupboard. Don Quixote de la Mancha enters, reading a book. He goes to the bookcase and, not finding it, believes it has been stolen by evil magicians. Then he settles into an armchair and continues reading. He delights in stories of brave knights, fabulous giants and other fantastical creatures, but most of all Don Quixote dreams of his beloved Dulcinea, a woman that he believes to be so lovely and noble that she must be divinity. Gradually he nods and falls asleep to dream of their romantic adventures. Darkness falls.
Suddenly his servant, Sancho Panza, climbs hurriedly through the window. In pursuit are several angry women from the market from whom he has stolen bread and a chicken. Awakened by the commotion, Don Quixote sends the women away. Don Quixote tells Sancho that he is determined to seek adventures as a knight-errant, all the while searching for his beloved Dulcinea. He shows him the pasteboard helmet, which, with one sweep from his sword, becomes a shapeless mass on the floor. Antonina suggests that he should use a shaving basin instead, which would make a splendid helmet. Don Quixote enthusiastically agrees and, placing it on his head, orders Sancho to bring him his armour, sword and spear, and to make ready his horse, Rocinante.
Act I
A market-place in Barcelona
Kitri, an inn-keeper's daughter, steals out of her house to meet her beloved, the barber Basilio. Her father, Lorenzo, sees the lovers and sends Basilio away, bringing Kitri to tears. Now comes the rich nobleman Gamache, who, likewise in love with Kitri, goes to Lorenzo and asks for his daughter's hand. The innkeeper accepts with delight but Kitri, appalled at the thought of wedding the foppish nobleman, runs away.
Dancing begins in the square and some toreadors try to kidnap the girls they fancy, but their relatives and lovers hasten to their aid. At this moment Don Quixote arrives mounted on Rocinante, followed by Sancho, who is riding a donkey. At his master's command Sancho sounds his rusted horn, causing the townspeople to cover their ears. Lorenzo runs out of his inn, and Don Quixote, taking him for the lord of a famous castle, dismounts Rocinante and, falling to his knees, begs to be allowed to serve him. Charmed, Lorenzo invites the knight to sit on his balcony. Sancho remains in the square where he is surrounded by girls who induce him to take part in a game of blind man's bluff. Then some boys bring in a blanket on which they place Sancho and proceed to toss him into the air. Don Quixote hurries to his assistance and sets him free.
Peasants gather in the square and dancing resumes. Kitri returns and, noticing her, Don Quixote acclaims her as his Dulcinea, whom evil magicians have reduced to human form. Becoming jealous of her affection for Basilio, Don Quixote attempts to woo her by partnering her in a minuet. Lorenzo berates Kitri for carrying on with Basilio. Kitri and Basilio then run away, and Lorenzo and Gamache follow them. Don Quixote orders Sancho to bring Rocinante, so that he may also set out in pursuit.
Act II
Scene 1 – A camp of gypsies among the windmills outside the village
Kitri, disguised as a boy is seen walking with Harlequin from a troupe of travelling actors. They guess she is a girl and ask her to stay with them.
Scene 2 - The Puppet Theatre
A clown is seen walking with Graziosa, the gypsy chief's daughter. A gypsy tells the chief of the approach of Don Quixote. The chief plans a trick for his benefit and, putting on a mantle crown, sits down as though he were a king on a throne. Don Quixote is deceived and kneels to the chief in homage. The chief bids that he sit beside him and orders a festival to be given in his honor. This begins with Gypsy dances and is followed by a performance of the marionette theatre. Don Quixote is delighted with the entertainment but, mistaking the heroine for his Dulcinea and the marionettes for soldiers attacking her, he rises to assault them. The gypsies are terrified. At this moment the clown and Graziosa run away.
Scene 3 - The Windmills
Flushed with victory, the knight kneels and renders thanks to heaven. Seeing the moon, he takes it for his Dulcinea and tries to get to her. As he approaches the windmills he can see the moon no longer and thinks that evil magicians have hidden his beloved mistress. So, spear in hand, he tilts at the wings of the windmill, which he mistakes for a giant. Alas, the knight is caught by one of the wings and flung into the air. He falls unconscious at Sancho's feet.
Scene 4 – A forest
Through the trees appears Sancho leading Rocinante, upon which sits the wounded Don Quixote. The servant lifts his master down and places him on the grass, so that he may rest. Then, tying up the horse, he goes to sleep. Don Quixote also tries to sleep, but is troubled by fantastic dreams.
Scene 5 – The enchanted Garden of Dulcinea
Fairies appear surrounded by gnomes and Don Quixote finds himself dressed in shining armor. Then comes a succession of fearsome monsters, the last being a gigantic spider, who spins a web. The knight attacks the spider, which he slashes in half with his sword. At that same moment the spider's web vanishes to reveal a beautiful garden, filled with dryads and beautiful women, presided over by the Queen of the Dryads and Amor. Among them is Dulcinea and Don Quixote kneels before his beloved. At this moment everything vanishes.
Act III
The Square
Back at the square, Kitri and Basilio join those who are dancing. At the height of the merriment, Lorenzo and Gamache arrive, followed by Don Quixote and Sancho. Seeing his daughter, Lorenzo decides to give his blessing to her union with the nobleman Gamache. Basilio becomes annoyed and, reproaching Kitri for her unfaithfulness, draws a sword and stabs himself. As he lies dying he begs Lorenzo to unite him with Kitri, but Lorenzo and Gamache refuse. Don Quixote approaches Gamache and challenges him to a duel for having refused a dying man's wish. Gamache declines to fight and the merrymakers drive him out of the inn. Taking pity, Lorenzo agrees to unite Basilio and Kitri. At this moment, Basilio pulls out the sword and tells everyone it was a joke.
Act IV
The Tavern
A magnificent feast is held in honour of Don Quixote. Suddenly the Knight of the Silver Moon challenges him to a duel, which results in the latter being vanquished. The victorious knight proves to be none other than Bachelor Sanson Carrasco, who forces Don Quixote to vow that he will not unsheathe his sword for a whole year. The sorrowful knight, true to his vow, takes up his warlike gear and, followed by Sancho, sets out for home.

纽约剧团要重排《天鹅湖》，因前领舞Beth（薇诺娜•赖德 Winona Ryder 饰）离去，总监Thomas（文森特•卡索尔 Vincent Cassel. 饰）决定海选新领舞，且要求领舞要分饰黑天鹅与白天鹅。Nina（娜塔莉•波特曼Natalie Portman 饰）自幼练习芭蕾舞，在母亲的细心关照下，技艺出众。这次，她希望可以脱颖而出。然而，在竞争中，她发现心机颇重的Lily（米拉•库妮丝 Mila Kunis 饰）是自己的强劲对手。在选拔中，她的白天鹅表演的无可挑剔，但是黑天鹅不及Lily。她感到身心俱疲，回家还发现了背部的红斑与脚伤。她一个人找到总监，希望争取一下。总监趁机亲吻她，却被她强硬拒绝。结果，总监居然选了她。队友怀疑她靠色相上位。在酒会上，Beth甚至当众发泄。这种压力外加伤病，一直影响着她的发挥。总监启发她要释放激情，表现出黑天鹅的诱惑。在强大的心理暗示中，她似乎也滑向了黑天鹅的角色……