With her son grown up, single mom Pearl Nolan decides to pursue her lifelong dream and launches a private detective agency, which she runs from her family's restaurant in the coastal town of Whitstable. Drawn by her caring nature, locals soon flock to her with all manner of cases. But when an old friend dies suspiciously, Pearl finds herself in conflict with gruff new cop in town DCI Mike McGuire.

A recently retired English professor discovers a real knack for investigation and cannot help but interfere with the cases assigned to her police detective son.