The time has come for three kits of ThunderClan-Hollypaw, Jaypaw, and Lionpaw-to become apprentices. Grandchildren of the great leader Firestar, all three possess unusual power and talent. But dark secrets surround them, and a mysterious prophecy hints at trouble to come. The warrior code is in danger of being washed away by a river of blood, and all the young cats' strength will be needed if the Clans are to survive.