Captured by a mysterious army just as they escaped a Campton overrun with 'zombie' children, Dodzi's group, along with what's left of the Clan of the Shark, discover an entire civilisation, ruled over by children who have been in the In-Between-World for a long, long time. Strict rules, a caste system, bizarre superstitions... All new obstacles for the group to overcome – although Saul is being treated like a messiah. And over it all hangs the threat of the sinister Midnight Child...