Set during the 1960s in the fictional North Yorkshire village of Aidensfield, this enduringly popular series interweaves crime and medical storylines.

Jack Frost is a gritty, dogged and unconventional detective with sympathy for the underdog and an instinct for moral justice who attracts trouble like a magnet. Despite some animosity with his superintendent, Norman “Horn-rimmed Harry” Mullett, Frost and his ever-changing roster of assistants manage to solve cases via his clever mind, good heart, and cool touch.

The story revolves around the disappearance of the father and mother of the three main characters, Harry, Zillah and Joe Fisher. The trio of intrepid youngsters are on the hunt for their parents in a drama where things are never as they seem.