When a young boy discovers the body of a woman beneath a thick sheet of ice in a South London park, Detective Erika Foster is called in to lead the murder investigation. The victim, a beautiful young socialite, appeared to have the perfect life. Yet when Erika begins to dig deeper, she starts to connect the dots between the murder and the killings of three prostitutes, all found strangled, hands bound, and dumped in water around London.

Is Alice here? Did she make it? Is she safe? In the chaos, in the night, it was impossible to say which of the four had asked after Alice's welfare. Later, when everything got worse, each would insist it had been them. Five women reluctantly pick up their backpacks and start walking along the muddy track. Only four come out the other side.

The police say it was suicide. Anna says it was murder. They're both wrong. One year ago, Caroline Johnson chose to end her life - a shocking suicide carefully played out to match that of her husband just months before. Their daughter, Anna, has struggled to come to terms with her parents' deaths ever since. Now with a young baby herself, Anna feels her mother's presence keenly and is determined to find out what really happened. But as she looks for answers, someone is trying to stop her.

DI Nikki Galena: A police detective with nothing left to lose, she's seen a girl die in her arms, and her daughter will never leave the hospital again. She's gotten tough on the criminals she believes did this to her. Too tough. And now she's been given one final warning: make it work with her new sergeant, DS Joseph Easter, or she's out.

When a woman's body is discovered in a cathedral and hours later a young man is found hanging from a tree outside his home, Detective Lottie Parker is called in to lead the investigation. Both bodies have the same distinctive tattoo clumsily inscribed on their legs. It's clear the pair are connected, but how? The trail leads Lottie to St Angela's, a former children's home, with a dark connection to her own family history. Suddenly the case just got personal.

On a remote Highland mountain, the body of Elaine Buxton is burning. All that will be left to identify the respected lawyer are her teeth and a fragment of clothing. In the concealed back room of a house in Edinburgh, the real Elaine Buxton screams into the darkness. Detective Inspector Luc Callanach has barely set foot in his new office when Elaine's missing persons case is escalated to a murder investigation. Having left behind a promising career at Interpol, he's eager to prove himself to his new team.

Kurz vor der sommerlichen Hochsaison wird der betagte Inhaber des legendären Hotel Central - Monsieur Pennec - erstochen aufgefunden...

Buried in a woodland grave are a mother and her child. One is alive. One is dead. DC 'Charlie' Stafford is assigned to assist with the missing persons investigation. As more pairs go missing, the pressure mounts. Leads are going cold. Suspects are identified but have they got the right person? Can Charlie stop the sadistic killer whose only wish is to punish those he deems to have committed a wrong, or will she herself unwittingly become a victim?

When Zoe Walker sees her photo in the classifieds section of a London newspaper, she is determined to find out why it's there. There's no explanation, no website - just a grainy image and a phone number. She takes it home to her family, who are convinced it's just someone who looks like Zoe. But the next day the advert shows a photo of a different woman, and another the day after that.Is it a mistake? A coincidence? Or is someone keeping track of every move they make?

He keeps each one floating in formaldehyde to prevent rotting. Each finger denotes a victim, their heart ripped out and replaced by symbols of their treachery. He admires his trophies weekly; to him each one of them is guilty. DC 'Charlie' Stafford is already investigating a series of escalating racist attacks, and it now seems she has a vicious serial killer on her patch. All the while he's watching, waiting...and counting.