First of a two-part drama, starring Hermione Norris, Martin Clunes, Paul McGann and Alexander Arnold. The murder of a schoolgirl rocks the residents of a quiet coastal town in Suffolk, and when Rosie stumbles upon a pair of bloodstained trainers hidden in her home, she suspects someone in her family may have been involved in the killing. With her son Jamie and stepson Rob both acting suspiciously, could she be right?