Queste takes Septimus, Jenna and Beetle in search of Nicko and Snorri, to bring them back from the past. They go to Marcellus Pye, who has remembered some information from his 500 year old memory and provides them with some notes from Nicko and Snorri. The notes say that they planned to travel to the House Of Foryx where all times meet, and there they expected to come back to their time. Jenna takes the notes back with her to the Palace.
In the meantime, Merrin Meredith travels to the Castle in hope of destroying Septimus. He bumps into Jenna who drops all the notes of Nicko and Snorri, they get wet. Jenna goes to the The Manuscriptorium and asks Beetle to help her Replace the notes. Beetle then takes her to the restoration specialist Ephaniah Grebe. Ephaniah is a half man half rat being. He Restores the pages and binds them in to a book. But they still missed one piece, the centre of the map to the House of Foryx.
Merrin has in the meantime, takes the job of a scribe in the Manuscriptorium. There he meets the ghost of Tertius Fume, the first Chief Hermetic Scribe. Tertius makes him transfer the loyalty of the Thing to him and assures that he will send Septimus on a perilous Queste. Tertius Fume arrives at the Wizard Tower along with the ghosts of all the previous ExtraOrdinary Wizards and announces that they are about to draw the Queste stone. Septimus feels a Darkenesse inside the urn where the stone is kept and tells that a Thing is there to sabotage the draw. They escape the Wizard tower as Tertius Fume puts it under Siege. But accidentally Septimus takes the Queste stone thinking it to be a KeepSafe.
Septimus, Jenna and Beetle start their journey to the House of Foryx. Sam Heap shows them the way. They eventually reach the House and find Ephaniah near it. He had found the last missing piece of the map but was possessed by the Thing. Septimus, Jenna and Beetle enter the House of Foryx, but accidentally all three of them go inside. There Septimus is taken inside a door by a girl and Septimus finds himself face to face with Hotep-Ra, first ExtraOrdinary wizard. In the meantime Jenna and Beetle find Nicko and Snorri and all of them try to escape the House of Foryx. Just as they were about to leave, Marcia and Sarah arrive outside the house on Spit Fyre, so all of them are able to return to their own time.