逃过摄魂怪的追杀，通过魔法部的审查，哈利（丹尼尔·雷德克里夫）终于回到美丽的霍格沃兹。然而这个学期并不轻松，他不仅要完成魔法等级考试，还要应对夜晚的噩梦和黑魔法防御课老师乌姆里奇的打压。在好友的支持下，哈利秘密组建了邓不利多军团，与大家一起练习黑魔法防御术。
噩梦中，哈利总是以伏地魔的视角出现，似乎他们之间有着某种神秘的联系。在邓不利多（迈克尔·刚本）的指示下，哈利向斯内普教授（阿伦·瑞克曼）学习封闭术，却鲜有成效。终于在一次噩梦的诱使下，哈利偏执的赶往魔法部营救小天狼星，却不想陷入伏地魔的圈套，引发凤凰社与食死徒之间的正面冲突。在混战中，小天狼星（加里·奥德曼）不幸遇难。
究竟哈利与伏地魔（拉尔夫·费因斯）之间有着怎样的联系？在悲恸中，邓不利多为哈利揭开谜底，哈利还有更长、更艰难的路要走……

The Tales of Beedle the Bard is also a plot device in the seventh novel of the Harry Potter series, Deathly Hallows, in which it is bequeathed to Hermione Granger by Albus Dumbledore. The book is described as a popular collection of Wizarding children's fairy tales, thus while Ron Weasley is familiar with the stories, Harry Potter and Hermione Granger had not previously heard them due to their non-magical upbringing.
The edition Hermione received in chapter seven in Dumbledore's will is a copy of the original edition of fictional books in the novel. It is described as an ancient-looking small book with its binding "stained and peeling in places". In the novel it is also said the book has a title on its cover, written in embossed runic symbols.
The book acts as the vehicle for introducing the Deathly Hallows. Above the story The Tale of the Three Brothers, Hermione Granger finds a strange symbol which later is revealed by Xenophilius Lovegood to be the symbol of the Hallows. The triangle from the symbol represents the Invisibility Cloak, the circle inside the triangle symbolizes the Resurrection Stone, and the vertical line represents the Elder Wand.