As the team delves deeper into the poisonings, it quickly becomes clear that those responsible have a powerful influence. The pressure builds for DI Wagstaffe to find buried links between Sofie Cerna and Nick Kyriacou, but when the investigation veers close to home, he finds himself making his sister's fiancé Paulo an offer that could have far-reaching consequences.
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 2 Synopsis and Schedule