Playdate is based on AmericanNorwegian author Dahl’s (no relation to Roald Dahl) fourth novel.　　In Playdate, a seemingly ordinary decision turns the world of Elisa, mum to two young kids, upside down. When Elisa’s nine-year-old daughter asks to go on an overnight playdate with her new best friend, Elisa agrees. But when she says goodnight to her daughter, she has no idea that she is about to be thrust into every parent’s worst nightmare, and when Elisa goes to pick her up, she discovers that the beautiful house was a holiday rental, while her daughter has disappeared. What follows is a manhunt across Europe, while Elisa and husband Fred find themselves the object of police scrutiny.

The series begins when suspected human remains are uncovered on Whitney Marsh - Jess and Sunny are immediately called to the scene, abandoning their evening plans to Jess’s husband’s chagrin. Dr Balcombe’s analysis reveals that the remains are relatively recent and suggest a grim conclusion the body was placed there already dismembered. With this insight, Jess and Sunny intensify their search certain that other body parts may not be far away.　　As the investigation unfolds, viewers are introduced to a diverse new cast of characters Melinda Ricci, an outspoken television commentator based in Ireland; Martin ‘Marty’ Baines, an autistic man living with his mother Dot in Deal, Kent; Asif Syed, an Afghan training for his UK citizenship test; and Juliet Cooper, a history lecturer and faculty head at a London university.　　While these characters live seemingly separate lives, they are intricately connected by their pasts. It’s up to Jess, Sunny, and their dedicated team to uncover these hidden links and ultimately expose the truth behind the cold case murder.