After learning that she is the Princess, Jenna is whisked from her home and carried toward safety by the Extraordinary Wizard, those she always believed were her father and brother, and a young guard known only as Boy 412--pursued by agents of those who killed her mother ten years earlier.
Pulled through a glass that brings him back in time, Septimus Heap becomes the apprentice of an alchemist.
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.
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.
Septimus must elude the plans of Merrin Meredith and Tertius Fume in order to find the House of Foryx, a place where all Time meets, and secure the release of Nicko and Snorri.
When Princess Jenna is pursued by a dark wizard, it is the apprentice, Septimus Heap, who must save her while enduring such terrors as a night in the Forest with hungry wolverines and carnivorous trees.
Septimus, Jenna, and Beetle assume larger roles in their Magykal world and continue Septimus' efforts to defeat the Dark Domaine by relighting the ancient Alchemie Fyre, a task that reveals magical origins and tests key loyalties.