Apprentice Septimus Heap must enter the Darke to save the Castle and the Wizard Tower from destruction, but he needs the help of many to battle the spreading Darkenesse.

Wolf Boy is sent on a Task by Aunt Zelda, while Septimus and the dragon, Spit Fyre, fly off to bring their friends home, but they all wind up on an island whose secrets are as dangerous as its inhabitants.

Nathaniel, a young magician's apprentice, becomes caught in a web of magical espionage, murder, and rebellion, after he summons the djinni Bartimaeus and instructs him to steal the Amulet of Samarkand from the powerful magician Simon Loveland.