Since his adventure in Grunsby-on-Sea, Steven Percival has been thriving. He's kept his powers under control, come out of the closet, and been with his handsome American boyfriend, Troy, almost every day this summer. He can't wait to start uni in London with his best friend, Freya, especially as Troy is going to a different university just a quick train ride away.

But Grunsby won't let him go. Around every corner, he's convinced that he's seeing Zachary, the evil emomancer who tried to leech his powers away. Steven also suspects Alice, a girl on his course, of being an emomancer, but the truth is even more surprising when it comes out: she can read and implant thoughts in people's minds, and has been causing a rift between Steven and his friends.

Steven, Freya, and Troy turn to DEMA for help, but even the secret organisation may not be safe anymore. Steven was right: Zachary has been keeping a close eye on the three friends, and from deep inside the organisation too...