The story tells the story of a murder involving six victims who were dismembered and stitched into a grotesque body called "Ragdoll". The shocking case is investigated by the newly reinstated Scotland Yard Detective Sheriff Nathan Rose (Henry Lloyd-Hughes), the former friend and boss Detective Sheriff Emily Baxter (Thalissa Teixeira) and Police Constable Lake Edmunds (Lucy Hale). When the "Muppet Killer" mocks the police by sending them a list of new victims including Nathan Rose, the protagonists will be under unprecedented pressure.