The story opens with the apparently accidental drowning of a sixth form student in the Norfolk countryside. As a matter of routine, or so it seems, the case passes across the desk of Detective Sergeant Smith, recently returned to work after an internal investigation into another case that has led to tensions between officers at Kings Lake police headquarters. As an ex-DCI, Smith could have retired by now, and it is clear that some of his superiors wish that he would do so.

Criminologist Martin Knight lives a gilded life and is a thorn in the side of the police. But then his wife, Liz, goes missing. There is no good explanation and no sign of Martin.... To make things worse, Liz is the ex-girlfriend of DCI Craig Gillard who is drawn into the investigation. Is it just a missing person or something worse? And what relevance do the events around the shocking Girl F case, so taken up by Knight, have to do with the present? The truth is darker than you could ever have imagined.

Judith Potts is 77 years old and blissfully happy. She lives on her own in a faded mansion just outside Marlow, there’s no man in her life to tell her what to do or how much whisky to drink, and to keep herself busy she sets crosswords for The Times newspaper. One evening, while out swimming in the Thames, Judith witnesses a brutal murder. The local police don’t believe her story, so she decides to investigate for herself and is soon joined in her quest by Suzie, a salt-of-the-earth dog-walker, and Becks, the prim and proper wife of the local vicar.

Every morning and evening, Zoe Walker takes the same route to the train station, waits at a certain place on the platform, finds her favorite spot in the car, never suspecting that someone is watching her. It all starts with a classified ad. During her commute home one night, while glancing through her local paper, Zoe sees her own face staring back at her - a grainy photo along with a phone number and a listing for a website called FindTheOne.com.

Jack Warr is a young DC with the Metropolitan Police. Charming but aimless, Jack can't seem to find his place in the world - until he's drawn into an investigation that turns his life upside down. In the aftermath of a fire at a derelict cottage, a badly charred body is discovered, along with the burnt remnants of millions of stolen, untraceable bank notes - the hidden legacy of Dolly Rawlins and her gang of Widows. Jack's assignment to the case coincides with an investigation into his own past.

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.

Detective Superintendent Peter Diamond is the last detective: a genuine gumshoe, committed to door-stopping and deduction rather than fancy computer gadgetry. So when the naked body of a woman is found floating in the weeds in a lake near Bath with no one willing to identify her, no marks, and no murder weapon, his sleuthing abilities are tested to the limit.

When five-year-old Ava Sawyer goes missing from a birthday party at a local garden center, the police are bewildered by the lack of leads. That is, until two years later, when Ava’s body is found and another little girl, Audrey Briggs, goes missing. Audrey also attended that party. Leading the investigation is Detective Natalie Ward. A mother of two teenagers, this case chills her to the bone and is a disturbing reminder of the last job she worked on. One that still keeps her awake at night.

After a scandal forces DI Kelly Porter out of the Met, she returns home to the Lake District. Crimes in the Cumbrian constabulary tend to be minor, but Kelly begins work on a cold case that shocked the local community - the abduction and brutal murder of a 10-year-old girl.

A teacher goes missing under suspicious circumstances and a man is murdered at a local reservoir. For Detective Robyn Carter, there's no obvious link between the cases. But as she starts to delve into them, her investigations lead her to Abigail, perfect wife and mother to beautiful little Izzy. What was Abigail's connection to the victims? And why is she receiving threatening messages from an anonymous number?

Five walkers set out to climb Ben Lomond on a fine October day. Within hours the weather has taken a turn for the worst. The group find themselves lost on the mountain. Two of the climbers manage to make it back down and call for help. The following day a body is found. One of the female climbers has been strangled, and another man is missing without a trace. DCI Dani Bevan is called to the Loch Lomond town of Ardyle to lead the case.

Six-year-old Lola Jade Harper is taken from her bedroom. Her mother is distraught. She is convinced her estranged husband, Gavin Harper, has abducted their daughter. Detective Rachel Prince is leading the investigation but is soon out of her depth as she searches for the most high-profile missing child in the country. To uncover the truth about Lola’s disappearance, Rachel must untangle the Harper family’s complicated web of secrets and lies.

It takes only one person to break the silence. When solicitor Finn Fitzpatrick is approached by a man to investigate the death of his daughter, her first instinct is to refuse. The father is grieving and unable to accept that his daughter committed suicide. And yet something about the man’s story chimes with Finn. Why did a bright, confident, beautiful young girl suddenly drop out of school, isolating herself from everyone who cared about her? Could it be that the father's suspicion is right and that his daughter was groomed and abused by the most famous film director in Ireland?

Derek Flint is a loner. He lives with his mother and spends his evenings watching his clients on the CCTV cameras he has installed inside their homes. He likes their companionship - even if it’s through a screen. When a series of crimes hits Derek's neighbourhood, DC Beth Mayes begins to suspect he's involved. How does he know so much about the victims' lives? Why won’t he let anyone into his office? And what is his mother hiding in that strange, lonely house?

When his longtime nemesis, the amphetamine-juiced killer known as "Upper" North, is spotted in England, Detective Chief Inspector Brock is on the trail. His manhunt centers on Silvermeadow, a huge and glittery new shopping mall on the outskirts of London, where North was seen. Lying in wait, he and Kathy Kolla take on a seemingly unrelated case as camouflage, that of a missing girl who had worked in the mall. But what to make of the rumor of other girls gone missing?