Nicola Walker and Sanjeev Bhaskar star in this six-part ITV detective drama. When a skeleton belonging to a young man is discovered below a demolished building DCI Cassie Stuart and DI Sunil Khan (Walker and Bhaskar) are brought in to lead the investigation. After identifying the body as a homeless male named Jimmy Sullivan (Harley Sylvester), the detectives unearth the names and addresses of four possible suspects, Beth, Father Rob, Frankie C and Mr. Slater, as named in Jimmy's diary. Will any of them hold the key to solving Jimmy's death?