Part 1

S1 E1: Crime drama. During an August heatwave in London, DI Will Wagstaffe and his team investigate what turns out to be a series of horrifying and brutal attacks on accused but unconvicted paedophiles. Haunted by the mysterious death of his own parents, Staffe pushes the boundaries in the search for the killer, but the truth he uncovers is more shocking than he could ever have imagined.