All seems well in the land of the four Clans. Firestar, the leader of ThunderClan, is proud that the Clans are at peace and thriving. But his dreams are being haunted by wailing cats, fleeing some terrible disaster. With some help from an old kittypet friend he discovers a shocking secret: StarClan, his ancient ancestors, have lied to him. Now he faces a hard decision. Can he really abandon his Clan in search of a dark secret, hidden from memory? With Sandstorm at his side he foes on a perilous journey to recover a missing Clan. Nothing will ever be the same again.