In the picturesque English region of Wildemarsh, Detective Matilda Stone (Florence Hall, The Princess Switch TV movies) investigates crimes with the aid-or, often, meddling-of her three mystery-writing aunts, who raised her from childhood. Together, they look into a murder at a health spa, a killing in the contemporary art world, and the theft of an Edgar Allen Poe manuscript. Matilda has decidedly less success with her personal affairs, continuing to pine for Daniel Lynch (Andrew Leung, Cruella) even as she begins a new romance. But while Matilda's love life hits a snag, she makes headway in the case of her mother's long-ago disappearance-despite her aunts' best efforts to conceal the secret she most wants to know.