In a dream, StarClan tells Brambleclaw, Feathertail (Graystripe's daughter), Crowpaw, and Tawnypelt (formerly Tawnypaw, Brambleclaw's sister) to listen to what "midnight" has to say. Eventually, they begin a journey in the direction of the setting sun. Squirrelpaw tags along and Stormfur insists on accompanying them to protect his sister, Feathertail, as the six cats trek into the unknown world. On their journey, they meet an old loner named Purdy who helps the Clan cats get to the sun-drown place (ocean). Eventually, they reach the sun-drown-place and enter a cavern inhabited by a highly intelligent American badger known as Midnight, able to speak the languages of cats, foxes and rabbits, who reveals to them that humans will destroy the forest and that the cats must either leave the forest or die. She also tells them that a dying warrior will lead the Clans to their new home. The book ends with a short epilogue back in the forest, where the humans begin to destroy ThunderClan's territory.