Fireheart, the warrior cat, faces many challenges in his new role of ThunderClan deputy as his apprentice, Cloudpaw, resists following the warrior code, Bluestar weakens, and Tigerclaw continues to haunt the forest seeking revenge.

Fireheart, a full-fledged warrior cat, must confront questions of loyalty and identity as he faces the possibility of betrayal from within his own forest clan. Fireheart is a ThunderClan warrior cat now, but danger still lurks in the forest -- and possibly closer than he thinks. With the chill of winter setting in, the cats of rival RiverClan are growing restless, while WindClan is weak and facing threats from all sides. As tensions build to an explosive...

A latest entry in the prequel story arc reveals new details about the history of the warrior cats and follows the efforts of Clear Sky to violently divide the territories of the forest cats in spite of Gray Wing's efforts to promote peace.

As Hollypaw, Lionpaw and Jaypaw, grandchildren of the legendary Firestar, continue their training to be warrior cats, each is haunted by a different internal struggle that could lead to trouble for all Clans.

The questing cats return to a forest devastated by the Twolegs, where they must find a way to convince their Clans to leave in search of a new home, even though they have no idea where they are going.

Leopardstar knows her destiny is to save RiverClan from destruction, so as the rise of ThunderClan deputy Tigerstar shatters peace among the clans, Leopardstar must decide what kind of leader she will be.

Jaypaw, Hollypaw, and Lionpaw have learned that the prophecy tells them they will hold more power than any cat before them. So when a mysterious cat arrives to warn the Clans of danger, the Clans' faith in their warrior ancestors is shaken.

"As a young warrior, Talltail's life is marred by a tragedy that fills his heart with bitterness. He sets off on a dangerous path in search of revenge--far outside the bounds of the warrior code"--

Amidst ongoing strife within and between the Clans of warrior cats, Brambleclaw is tempted by the dark plans of his father and brother, and the meaning of Leafpool's ominous visions becomes clear.

Bluefur, a warrior of ThunderClan, struggles under the weight of a prophecy that promises her glory as Clan leader, but also spells out her ultimate demise.