Jo Beckett is a forensic psychiatrist who profiles victims' lives to help solve their deaths. On a San Francisco street, she is confronted by a scene of pure carnage: four dead and five injured after a high speed pursuit. In the mangled remains of a BMW lies prosecutor Callie Harding, dead with the word dirty written in lipstick on her thigh. Why did Harding run from the police? Why did she crash through a bridge railing? Was it an accident? Suicide? Or murder? Jo is a last resort in difficult cases. But now she's on the front line, because Callie Harding isn't the first high flyer to go down and take others with her . . .