For generations, four Clans of wild cats have shared the forest according to the laws laid down by their ancestors. But the warrior code is threatened, and the ThunderClan cats are in grave danger. The sinister ShadowClan grows stronger every day. Noble warriors are dying - and some deaths are more mysterious than others. In the midst of this turmoil appears an ordinary housecat named Rusty...who may turn out to be the bravest warrior of them all.

Echo, a water buffalo, is chosen by the Great Spirit to lead after a horrific accident—but can’t command the respect of any of his herd. Stride the cheetah is keeping secrets from his coalition that could get him killed for disloyalty. And Tailgrabber, a young hyena, is desperate to find peace between her clan and the lions of Noblepride—even though it marks a betrayal of the hyenas’ longstanding allegiance to the Great Devourer.

For generations, the Silverback gorilla troop has lived in peaceful seclusion high above the Great Herd, adhering to one rule: “blood pools on the plains”. But when a new and terrifying evil descends on their home, every animal must venture into the unknown to prevent darkness from overtaking all they hold dear.

The pandas of the Bamboo Kingdom have never forgotten the great flood that ended the peaceful life they’d always known. But for three young creatures born that day, the flood marks not an end, but a beginning - the beginning of their struggles to find a place in very different worlds.

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.