For generations, four Clans of cats have shared the forest. But ThunderClan is in grave danger, and ShadowClan grows stronger every day. In the midst of this turmoil appears a house cat named Rusty ... who may turn out to be the bravest warrior of them all.
The warrior cat Fireheart's determination to uncover the truth about another warrior's death leads him deep into danger, and reveals secrets that test the strength of clan loyalties.
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.