For years, the city-dwellers have lived in uneasy discord with The Others - a community of wanderers forced to shelter within the city walls after they were driven from their nomadic camps in the wilderness. But Undone is a dark and dangerous place to live, especially if you're an Other.

When the Master captures Gabriel and throws him into the Ring, Lily is saved by a young Other boy called Dekka. He introduces her to a whole Otherworld that exists beneath the City of Undone.

To her astonishment, Lily discovers she is an Other, too - with powerful gifts - and is now in grave danger: because the Master wants her dead. But why?