Jo Conchie

Cheshire, the north west of England, May 2013. When a French-speaking man contacts local police confessing to killing his housemate several years earlier, two detectives set out to discover the truth. The discovery of a body buried in a concrete tomb in a seemingly ordinary neighbourhood triggers an investigation that uncovers a shocking story of betrayal, deception and brutal murder.

In a South London police station, officers are shocked to discover a man has been murdered in a locked cell. The suspected killer is his cellmate, a homeless man named Kieran Kelly, in custody for theft. Police interview 53-year-old Kelly, who has a long rap sheet for petty crimes, and he calmly confesses to killing the man in the cell, but detectives are unprepared for what comes next.