New territory brings new troubles for the fierce cats of the warrior Clans. Dangers they have never faced before are lurking in the twilight shadows, and former allies are acting strangely hostile.

As divisions between the Clans grow deeper, Firestar's daughters face troubling decisions. The choices they make now could affect ThunderClan for generations to come . . . and with an unexpected enemy preparing to attack, their courage and strength will be needed more than ever if the Clan is to survive.