Blackstone was once a thriving metropolis. But that was before the Dark Summer - a wave of violence and crime that swept through the city eight years ago, orchestrated by the fearsome Spinning Man. Now the Spinning Man is on the move again, and a boy named Caw is about to be caught in his web.Caw has never questioned his ability to communicate with crows. But as the threat of a new Dark Summer looms, Caw discovers the underground world of Blackstone’s ferals - those with the power to control animals. Caw is one of them. And to save his city, he must quickly master abilities he never knew he had . . . and prepare to defeat a darkness he never could have imagined.