Hollypaw, Jaypaw, and Lionpaw - grandchildren of the great leader Firestar - possess unusual power and talent. But secrets and uncertainty surround them, and a mysterious prophecy hints at trouble to come. The warrior code is in danger, and these three apprentices will need all of their strength to help the Clans survive.

The Clans have finally arrived in their new home, and now, they must struggle to establish territories, learn hidden dangers, and find a new place to communicate with StarClan. But more than one cat is harboring sinister plans that could lead to violence and darkness, and as the warriors wait for a sign, they begin to realize the threats they face in the forest may not be as perilous as the threats they face from within.

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.

It is a time of peace between the warrior Clans, and all four are thriving. Then Firestar, leader of ThunderClan, discovers a terrible secret: The warrior ancestors of StarClan have lied to him. Firestar must embark on a perilous journey to right their wrong - and nothing will ever be the same again.