When a seemingly perfect and happy family is murdered by someone they know and trust, the small scottish community they call home becomes riven with mistrust and suspicion as those closest to the family begin to question everything they thought they knew about their friends. David tennant broadchurch, doctor who, good omens and cush jumbo the good fight, the good wife, vera lead the cast of this darkly gripping drama filmed entirely on location in scotland. Written by daisy coulam humans, grantchester, the series also stars matthew mcnulty versailles, cleaning up, the terror and anna madeley patrick melrose, the crown, utopia in this psychological piece exploring the cause and aftermath of violence and unthinkable tragedy.