Led by their sinister leader Darktail, a group of rogue cats has done the unthinkable: taken over the territory of one of the four Clans by the lake. Most of ShadowClan's young warriors and apprentices have joined the rogues, and Rowanstar and the few remaining loyal cats have taken shelter with ThunderClan. Alderpaw knows the only way forward is to fulfill StarClan's prophecy. They must find what's left of SkyClan-but that's a quest Alderpaw has already failed to complete once before...