After Tiny, a kitten, is injured fighting wild forest cats, he moves to a city, Twolegplace, where he defeats a dog, becomes the leader of the stray cats, and changes his name to Scourge.

Sasha has decided to forge a life outside of the Clans and away from Tigerstar's evil plots and plans. But life as a rogue is much harder than she expects, and Sasha soon starts to lose hope. Will she be forced to wander alone forever, scrapping for every meal and fighting with the cruel, territorial cats who dwell in the alleys of Twolegplace?

When Sasha is forced to leave her home, she must forge a solitary new life in the forest. When Sasha meets Tigerstar, leader of ShadowClan, she wonders whether she would be better off joining the ranks of his forest Clan. But Tigerstar has many secrets, and Sasha must decide whether she can trust him.