The charred remains of a man are discovered, showing signs of torture. The body was abandoned on the wild moors of the peak district, but he wasn’t killed there.

An arson fire in Sheffield reveals the site of another murder, this time of a young woman, and DI Diana Walker finds herself investigating two murders.

When the victim’s identities are revealed, Diana begins to dig into Sheffield’s criminal underworld where she uncovers webs of corruption at the city’s heart.