With her son now an adult, Pearl Nolan, a single mother, decides to fulfill her lifelong ambition by starting a private detective agency, operating it out of her family’s eatery in the seaside town of Whitstable. Her compassionate demeanor quickly attracts locals who bring her a variety of cases. However, when a longtime friend passes away under mysterious circumstances, Pearl clashes with the town’s new, tough detective, DCI Mike McGuire.