The fate of all Clanhood hangs in the balance. After killing Harelight and pronouncing himself leader of RiverClan, Splashtail's thirst for power has only grown. Soon his greed threatens the safety of not only RiverClan but all Clans. Yet Splashtail's trickery knows no bounds, and the Clans find themselves in more danger than they could have imagined. Only one thing is certain: They will have to work as one to defeat Splashtail before he tears them apart.

It has been foretold that Jayfeather, Lionblaze, and one other cat will hold the power of the stars in their paws. Now they must wait for a sign from StarClan to tell them which of their Clanmates will complete the prophecy.  

Deep in the heart of the forest, four Clans of warrior cats coexist in uneasy harmony - but uncertain times are upon them, and dangers threaten the precarious balance of the forest. Fireheart is a ThunderClan warrior now, but his troubles are far from over. The cats of rival RiverClan grow restless while WindClan is weak and faces threats from all sides. Now Fireheart faces not only imminent battle but betrayal from within his own Clan.

For the first time, all five warrior Clans have settled into their true homes in the territory around the lake. But when a shockingly harsh leaf-bare season descends on the forest, a new darkness begins to spread - a shadow that threatens a beloved Clan leader, the cats’ connection with their ancestors in StarClan, and the very warrior code by which they live. 

For many moons, ThunderClan, ShadowClan, RiverClan, and WindClan have lived in peace in their territories around the lake. But now, they must decipher a mysterious prophecy - a message that will send one young medicine cat apprentice on a quest to determine the fate of all the warrior Clans.