After a postman discovers a woman brutally murdered in West London, it seems like just another isolated incident in an uncaring city. When Detective Inspector Scott Daley and Detective Sergeant Deborah Whetstone are called in to investigate, they find striking similarities with an unsolved homicide four years before and they fear that a serial killer has awoken. Soon they are immersed in a web of silence and half truths, stretching back to an enigmatic fraternity group at Coventry University in the 1990s. As the sins of the past bleed through to the present, Daley and Whetstone are in a race to uncover the dark secret that lies beneath the surface of these ordinary lives before the killer finds their next victim. Who was exterminating the Monday Club and why?