Over thirty years ago, three generations of one family were murdered at their isolated farm. Initial evidence pointed the finger at the daughter of the family who had a history of mental illness, however one detective refused to accept this and delved deeper into the investigation. His determination uncovered new evidence that shed suspicion on the only surviving member of the immediate family, the son, who was subsequently sentenced to life imprisonment. This is a dramatised true crime story based on extensive research, interviews and published accounts, looking at the mystery behind what happened that fateful day, only made more contentious as the son still protests his innocence to this day.

Freddie Fox takes the role of Jeremy Bamber with Mark Addy, Stephen Graham, Gemma Whelan, Cressida Bonas, Alfie Allen and Amanda Burton also starring.