DI Will Wagstaffe and his team investigate the mysterious death of a young nurse on the London Underground. Whilst CCTV reveals the victim fleeing an invisible assailant, forensics find a DNA link to a missing teenager presumed dead for seven years. Aided by his new team DS Rob Mullan, DC Ray Monk, DC Annie Webb and pathologist Dr Luke Paul, Will unearths a bond of secrets and betrayals which leads him straight into the dark underbelly of the city.
Detective Inspector William Wagstaffe (Tom Riley), 32, is haunted by the murder of his parents during a family holiday in Spain when he was 16 years old. The killers are still at large and 'Staffe' is unable to let go until he finds them. It is probably no coincidence that after leaving school and joining the police force he rose quickly through the ranks to become Detective Inspector before the age of thirty.
Dark Heart - Dead Men Don't Pay Debts - Part 1 Synopsis and Schedule