No murder is ever simple… When DI Vera Stanhope finds the body of a woman in the sauna room of her local gym, at first, she thinks it is a death from natural causes. But then Vera spots ligature marks around the victim's throat and has another murder case on her hands. The victim is Jenny Lister, who was an experienced social worker, but her neighbours are quick to inform Vera about Jenny's involvement in a notorious case. A young child tragically died and a member of Jenny's team was subsequently fired and vilified by the media. As Vera tries to pry information from the secretive community another body is found, and Vera finds herself in a race against time to stop the killer.