A petty criminal turns into a killer. A man is stabbed to death in a pub car park by a stranger. As Wycliffe investigates, the victim turns out not to be the upstanding businessman he seemed to be.

Wycliffe and Kersey exchange strong words as they investigate a disturbing case involving the contamination of jars of baby food in a local supermarket by a blackmailer. Meanwhile, the disciplinary enquiry into Wycliffe's team continues to run its course.

A dark family secret comes to light when a girl deliberately runs over a woman on a pedestrian crossing. The results of the enquiry board are revealed.