"13-year-old Alice TodHunter Moon goes in search of her friend Ferdie, who has been kidnapped by the malevolent Lady, encountering Septimus Heap, ExtraOrdinary Wizard, and awakening her own Magykal potential"--Provided by publisher.

Septimus and his friends wind up on a mysterious island with a dangerous Syren and a villainous band of sailors.

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 must battle the remnants of the Dark Domaine, which will remain until the power of the evil Two-Faced Ring is destroyed forever. To accomplish that, the ancient Alchemie Fyre must be relit -- a task that sends Septimus to the very origins of Magyk and Physik, testing both his skills, and his loyalties to ExtraOrdinary Wizard, Marcia Overstrand, and Alchemist Marcellus Pye.