A victim. A mutilated body. A single word. A young woman is found dead on the streets of London. Her throat slashed, her body mutilated, and one word carved into her flesh: “DON’T.” Detective Superintendent Ray Paterson is assigned to the case. Young, handsome and from a wealthy background, he’s tipped for the top. He joins a team based out of Bermondsey, South London. It’s meant to be a stepping stone to his next promotion, but this case will threaten to bring down his career and everything he thought he knew about policing. 

Two skeletons are discovered in Lamentation Tarn, a mountain lake. Talented detective Mike Nash and his team have little evidence with which to work, until a surprising discovery prompts them to contact law enforcement agencies in Eastern Europe.

A young woman is brutally attacked on her way home. It looks like she was the victim of a jilted—and twisted—ex-lover. But then two more women, also engaged to be married, are found dead. The press call the killer the "Surrey Stalker". And there’s a stack of similar cold case files. The pressure is on for young, ambitious DI Rob Miller. But with all the time he’s spending at the office, Rob’s also running a fine line trying to keep his fiancée, Yvette, onside as they try to plan their wedding.

A teenage girl is found murdered, encased in glass. Detective Dove Milson is called out to a chilling murder scene by the coast. The murder is a replica of the work of a serial killer known as the Glass Doll Murderer, who entombed his victims in glass to watch them die. He would've be the prime suspect, but he's already dead. The kicker? Dove's own niece was one of the Glass Doll's original victims. 

A little girl, presumed dead, turns up playing happily in the park. She is barefoot but otherwise unharmed. The child’s mother who lives on a notorious local estate doesn’t seem bothered that her daughter has returned alive. Meanwhile, a man is tortured by a ruthless criminal. The victim’s severed hand is left on his wife’s doorstep.