Tigerclaw is back and more dangerous than ever as the new leader of ShadowClan, but he is not the most terrifying enemy Fireheart must face as a new force sweeps through the woods.

"The Clans have finally arrived in their new home, and now they must establish territories and uncover the hidden dangers of this unfamiliar world. But the threats they faced in the forest may not be as perilous as the threats they face from within" -- Page [4] of cover.

ThunderClan's darkest hour is upon them and Fireheart, the warrior cat, must protect his clan from a threat unlike any the forest has ever seen, as the time comes for prophecies to unfold and heroes to rise. ThunderClan's darkest hour is upon them, as Tigerstar's quest for power plunges all the Clans into the most terrible danger any cat has ever faced. In order to save his Clan and his friends, Fireheart must uncover the meaning of an ominous proclamation...

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, 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.

As a young warrior, Crookedjaw pledges his undying loyalty to RiverClan in exchange for the promise of power, not realizing that his pledge will haunt him when he becomes the leader of his Clan.

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.

Graystripe, deputy leader of ThunderClan, has finally returned to his forest home after being kidnapped by Twolegs, and finds that Firestar has appointed a new deputy leader.

As Dovepaw, Jayfeather, and Lionblaze strive to understand and fulfill the prophecy that promises them great power, the cats of the Dark Forest begin to teach battle skills and techniques to different Clan cats through dreams.

"As doubt rocks the forest, Hollyleaf, Lionblaze, and Jaypaw are determined to convince the warrior Clans that faith in StarClan and the warrior code is more important than ever. At the same time, vicious rage lurks in the most unexpected places, and one cat will reveal a breathtaking secret..."--Cover [p. 4].