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.

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.

Pulled through a glass that brings him back in time, Septimus Heap becomes the apprentice of an alchemist.

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.