Simon and Baz and Penelope and Agatha have to decide how to move forward. For Simon, that means deciding whether he still wants to be part of the World of Mages---and if he doesn't, what does that mean for his relationship with Baz? Meanwhile Baz is bouncing between two family crises and not finding any time to talk to anyone about his newfound vampire knowledge. Penelope would love to help, but she's smuggled an American Normal into London, and now she isn't sure what to do with him. And Agatha? Well, Agatha Wellbelove has had enough. This ending to the Simon Snow trilogy takes the gang back to England, back to Watford, and back to their families for their longest and most emotionally wrenching adventure yet. It is a finale that tells secrets, answers questions, and lays ghosts to rest.