With her son Edward (Tom Hiddleston) about to embark on a volunteer trip to Africa, doting mother Patricia (Kate Fahy) wants to give him a good send-off, and gathers her family together for a getaway to a holiday home on idyllic Tresco, one of the Isles of Scilly. Edward’s father’s attendance is eagerly anticipated, though sister Cynthia (Lydia Leonard) appears to be there under some duress, going through dutiful motions. Cook Rose (Amy Lloyd) is happy to tend to the family, though her presence causes some discomfort. The holidaymakers spend their time walking, cycling, taking picnics and being tutored in oil painting, appreciating the breathless beauty of their surroundings. Gradually, deep fractures within the family set-up begin to surface. One of the most eagerly anticipated features of the year, Joanna Hogg’s follow up to Unrelated serves as a worthy companion piece to her brilliant and acclaimed debut, as she continues to make astute and authoritative observations on the malaises of the middle-class, extracting sometimes painful drama from incidental events. Archipelago confirms Hogg as one of the most intriguing and vital voices in modern British cinema.

法律系毕业生辛尼三十出头，不愿长大和轻浮的性格令女朋友云妮向他提出分手。为了令她回心转意，辛尼向福利署讹称是五岁男孩朱利的生父并收养他，藉以证明自己是可付托终生。岂料云妮去意已决，辛尼只好勉为其难继续收养朱利。辛尼渐渐和朱利培养出感情。这时，福利署揭发辛尼的谎言；为了做“带子洪郎”，辛尼决定踏出人生重要一步……

　　由于暴风雪的袭击，机场取消了所有的航班，兄妹斯潘塞（戴连·克里斯托福 Dyllan Christopher 饰）和凯瑟琳（Dominique Saldana 饰）被滞留在了机场内。在航空术语里，斯潘塞和凯瑟琳被称为“UM”，即“无人陪伴的未成年人”，因此，他们被送往了机场专门设置的“UM看护中心”。 　　在看护中心里，有着许多和兄妹两情况相同的孩子，在那里，兄妹两认识了白富美格蕾丝（Gina Mantegna 饰），假小子多娜（奎恩·谢法德 Quinn Shephard 饰），天才查理（泰勒·詹姆斯·威廉姆 Tyler James Williams 饰）和宅男蒂莫西（布莱特·凯利 Brett Kelly 饰）。由于受不了看护中心内的混乱和吵闹，斯潘塞兄妹和他们的四个小伙伴们决定出逃。