An inoffensive man is murdered in a seemingly motiveless attack. Detective Inspector Geraldine Steel and her team are baffled, until DNA from an apparent stranger is discovered on the victim's body. Geraldine is not convinced the suspect is guilty. When a witness comes forward to offer the suspect an alibi, Geraldine lets him go. That night, a second murder is committed. The evidence points to the suspect who has just been released. As Geraldine attempts...