For generations, four clans of wild cats have shared the forest. When their warrior code is threatened by mysterious deaths, a house cat named Rusty may turn out to be the bravest warrior of all.

"When a storm-tossed river sweeps Ripple away from the park he's always known, he commits himself to the life of a peaceful loner. Still, as his new island home starts to become a sanctuary for other rogues, he can't help but feel responsible for their safety, and for the community--and Clan--they are beginning to build. But when an old friend from the park resurfaces with terrible news just as the forest cats' fights begin to escalate into bloodshed,...

"The imposter walking in Bramblestar's pawsteps retreats to the Dark Forest, where the other Clans must follow if they hope to restore their connection with their ancestors in StarClan"--

While Frostpaw takes refuge in ShadowClan as Splashtail seizes control of her home, Nightheart returns to ThunderClan and to a complicated reunion with his mate Sunbeam whose efforts to fit in as ThunderClan's newest member are hampered by her treacherous mother.