Trust no cat! This warning from her slain mother weighs heavily on the heart of the young RiverClan apprentice Frostpaw. Despite the warning, she sets out for WindClan to seek advice from the healer apprentice Whistlepaw. When she is attacked from behind and seriously injured, she realizes that she needs help and must consult the StarClan. Ultimately, the ancestors are ready to guide RiverClan into the future.