After a botched hostage rescue, Superintendent Sandra Pullman takes charge of cold cases with limited resources and support. She assembles a team of three retired detectives, but they struggle to adapt to the modern police force. Jack Halford is still grieving his wife's loss, Brian Lane is over- medicated and obsessed, and Gerry Standing's ladies' man persona has faded. Despite their experience, they must navigate a changed police force and outdated methods.
The team delves into a 17-year-old cold case of a murdered policewoman, uncov...