Written by the critically-acclaimed screenwriter Russell Lewis, this adaptation of the bestseller by Peter James stars John Simm and follows the Brighton-based Detective Roy Grace, who has hit rock bottom in his life. His wife Sandy disappeared six years ago, and Roy spends all his time investigating cold cases. Meanwhile, his different ways of working are being questioned by his bosses, risking his job. However, things look set to change when his colleague Detective Glenn Branson asks for his help on a difficult case.