The series focused on various murders in the fictional suburban English town of Middleford. The crimes are solved by two female police detectives, Inspector Kate Ashurst and Sergeant Emma Scribbins, aka "Ash and Scribbs".
A strait-laced British inspector is transferred to St. Marie Island's police department. Unfortunately, he hates the sun, sea, and sand. In later series, an accident-prone officer heads the Caribbean investigative team.