A man is found poisoned by the deadly toxin aconite. A note found at the scene leads Detective Sergeant Jack Mackinnon to a University of Oxford laboratory, where staff and students are desperate to hide their association with the victim. As Mackinnon gets closer to the truth, he finds his own family could be at risk. 

When two teenage girls vanish without a trace from an educational retreat at Chidlow House in Lincolnshire, the students and teachers are put on high alert. Called in to investigate, Detective Karen Hart questions everyone who came into contact with the two girls, Cressida and Natasha, in the days leading up to their disappearance. Stories of Chidlow House being haunted abound, but Hart - still coming to terms with the suspicious circumstances surrounding the tragic loss of her own family - knows that while the house might be otherworldly, the crime is grimly real.

A man is found bludgeoned to death in woodland by the village of Canwick, and the close-knit community is sent into shock. Detective Karen Hart, still haunted by the tragic loss of her husband and daughter nearby, is brought in to investigate the horrific murder. It soon becomes clear that dark secrets lie behind Canwick’s unspoiled appearance. When Hart begins to suspect that a modern-day slavery ring has been hiding in plain sight among the villagers, she faces a race to find proof before the culprits slip from her grasp.

Detective Jack Mackinnon’s career is in serious trouble. Still in the Detective Chief Inspector’s bad books and excluded from the Major Investigation team, Mackinnon is assigned the case nobody wants. As Mackinnon investigates, he discovers a horrifying link to a crime committed a decade ago. Not forgotten. And never forgiven...

When decomposed human remains are discovered in a suitcase behind a locked door in the home of an elderly man, Detective Karen Hart thinks the facts speak for themselves. That is, until she finds the warning: It’s time to pay for your crime. The body belongs to a former teacher, Oliver Fox, who vanished from the village thirty years earlier. Hart’s instincts tell her there is something untoward about this rural Lincolnshire community - especially when she uncovers evidence suggesting that, although Fox was a victim, he certainly wasn’t innocent. 

When two young girls disappear from their primary school, the village of Heighington is put on high alert - and not for the first time. Called in to investigate, Detective Karen Hart is sure that parallels with a previous disappearance are anything but coincidental. DS Hart is still reeling from a case she tried and failed to solve eighteen months ago, when a young woman vanished without a trace. She’s no nearer to the truth of what happened to Amy Fisher, but with two children missing now, too, the stakes have never been higher.

A vicious killer...a race against time. When two men are found mutilated in Birmingham's gay village just before Christmas, DI Zoe Finch and her team are perplexed. Did their attacker mean to kill one of the men, or simply injure them both? And who would have the surgical skills for such a precise mutilation? When more bodies are found with the same injuries, the city's gay population is rightfully scared. And then, someone close to Zoe becomes a target.

When DI Zoe Finch and her colleagues rush to respond to a terrorist attack, the city is plunged into chaos. But Zoe begins to suspect that all is not as it seems. Could the attack be a smokeshield for other criminal activity? And are Zoe's own colleagues involved in that cover-up?

Two years ago, Beth turned her back on her three-year-old niece for just a few seconds. She disappeared without a trace. One day, Beth receives a photograph from an anonymous number; she is sure it's a photograph of her niece. She is determined to find her and bring her home. But someone isn't pleased when Beth returns, and they will do what it takes to get rid of her for good.

When a young man is found dead at Birmingham University, the police initially think it's a drug overdose. But when DI Zoe Finch learns that the victim was accused of raping a fellow student, she starts to suspect this might not be so straightforward. Suspicion falls on the rape victim, but when she provides an alibi, Zoe's team. must look elsewhere. And then another man dies in the same way.

"You get one of your children back. Your choice." When Alison Osman takes her children on a trip to Cadbury World, she thinks their squabbling is her worst problem. But when she turns to find them gone, she's plunged into every mother's worst nightmare. And then the message arrives, telling Alison she has three days to choose one of her children. Detective Inspector Zoe Finch and her team need to find answers, and fast. Why is Alison's police officer husband behaving suspiciously? If the children's father died in a climbing accident, why was there no body?

If she can't get justice, will she settle for vengeance? Kaz Phelps has escaped her brother and her criminal past to become an anonymous art student in Glasgow. But can life under the witness protection scheme ever give her the freedom she craves? Banged up and brooding, Joey Phelps faces 30 years behind bars. Still, with cash and connections on the outside, can an overstretched prison system really contain him? Helen Warner, once Kaz's lawyer and lover, is a rising star in Parliament.

Detective Megan Thomas hoped that moving to Devon would mean a quiet life. Her years undercover in London left her broken and alone, unsure if she would ever recover. Slowly, she’s learning to work with a team and trust other people. But when her sister, Debbie, finds the body of local businessman Greg Porter, that peace is shattered. Porter’s wife and children don’t seem entirely grief-stricken, and his business dealings are not all they appear to be. So why are the police so determined to focus on Debbie? 

One August afternoon, eight-year-old Grace Lennard skips into the garden of the childcare center she attends and vanishes into thin air. Rushing to the scene of Grace’s disappearance, Detective Kim Stone finds a chilling piece of evidence: the engraved heart bracelet belonging to Melody Jones - the little girl who was taken from a playground exactly 25 years ago. Hours before, Steven Harte had walked into Halesowen police station and confessed to having information that would lead Kim to Melody. And he told Kim she’d have a more urgent problem to deal with first. 

When a murderer leaves a familiar pink scarf as his calling card, Detective Chief Inspector Whitney Walker is forced to dig into a cold case, not sure if she's looking for a killer or a copycat. With a growing pile of bodies, and no clues, she turns to forensic psychologist Dr. Georgina Cavendish despite their relationship being at an all-time low. Can they overcome the bad blood between them to solve the unsolvable?