ShadowClan has a dark new leader, but will he be satisfied with his power now -- or does his desire for revenge burn even more strongly? Fireheart fears that there is a connection between the rise of Tigerstar and the terrible dreams that haunt his nights, murmuring of danger and death.

Meanwhile, a mysterious and vicious threat unlike any other has invaded the forest, placing every cat's life in peril. Fireheart's beloved leader has turned her back on their warrior ancestors, and Fireheart can't help but wonder if she's right. Has StarClan abandoned them forever?