An expensive mobile home, abandoned in a new housing development, reveals a fearful secret when finally it is opened by police: the decomposed body of a former colleague. But what became of Sandra Bulloch after she left the police service? What chain of events led to her murder? DCI Lottie Mann is tasked with finding the killer of her former boss, and investigation that draws Bob Skinner into its web, just as a second mystery develops for him in his new Spanish base.