A family is torn apart by a rushing police car. Brian Reid has been tortured for years by witnessing the tragic events. But what exactly did he see?A chance encounter a decade later prompts Brian and his sister Elizabeth to investigate what really happened on that day. Meanwhile, a serial killer follows his quest to prevent others feeling the pain he suffered as a boy. He plans methodically. He is the Careful Killer. Naive and inexperienced DC Greg Anderson works with DS Angela Porter. Angela is headstrong with little respect for authority. She doesn't play by the book. She's never read the book. As the body count rises, the two young detectives begin to suspect the old accident and killings are linked. They don't know the answers. They don't know if they're asking the correct questions. Desperate measures are called for.