It starts with a phone call to Superintendent Dalziel from an old friend asking for help. But where it ends is a very different story.

Gina Wolfe has come to Mid-Yorkshire in search of her missing husband, believed dead. Her fiancé, Commander Mick Purdy of the Met, thinks Dalziel should be able to take care of the job. What none of them realize is how events set in motion decades ago will come to a violent head on this otherwise ordinary summer's day.

A Welsh tabloid journalist senses the story he's been chasing for years may have finally landed in his lap. A Tory MP's secretary suspects her boss's father has an unsavoury history that could taint his prime ministerial ambitions. The ruthless entrepreneur in question sends two henchmen out to make sure the past stays in the past. And the lethal pair dispatched have some awkward secrets of their own.

Four stories, two mismatched detectives trying to figure it all out, and 24 hours in which to do it: Dalziel and Pascoe are about to learn the hard way exactly just how much difference a day makes…