This eight-episode series is based on the documentary series of the same name, as well as various books and reports written about the Michael Peterson (Colin Firth) case. Peterson was accused of murdering his wife Kathleen (Toni Collette) in 2001. It was claimed that Kathleen died after falling down the stairs following alcohol and Valium consumption, but police suspected she was bludgeoned to death and believed it was staged to look like an accident.