The dark forces that have driven a rift between the four warrior Clans are growing stronger. While Lionblaze remains focused on protecting ThunderClan from another deadly battle, Jayfeather receives a desperate plea for help from the Tribe of Rushing Water and must travel to the mountains in search of answers. But with the summons comes an ominous warning that suggests the power of the stars may not be enough to save the Clans…

The battle between the Dark Forest and the warrior Clans has come. As the cats seek out their allies and enemies, Jayfeather, Lionblaze, and Dovewing wait desperately for the fourth cat who is prophesied to help them lead the Clans to victory—and who may be their only hope for survival.