Two years ago, a hostile Prime Minister launched the Monochrome inquiry, investigating "historical over-reaching" by the British Secret Service “to investigate historical over-reaching.” Monochrome’s mission was to ferret out any hint of misconduct by any MI5 officer—and allowed Griselda Fleet and Malcolm Kyle, the two civil servants seconded to the project, unfettered access to any and all confidential information in the Service archives in order to do so. But MI5’s formidable First Desk did not become Britain’s top spy by accident, and she has successfully thwarted the inquiry at every turn.

Titus Crown is the first Black sheriff in the history of Charon County, Virginia. In recent decades, quiet Charon has had only two murders. But after years of working as an FBI agent, Titus knows better than anyone that while his hometown might seem like a land of moonshine, cornbread, and honeysuckle, secrets always fester under the surface. Then a year to the day after Titus’s election, a school teacher is killed by a former student and the student is fatally shot by Titus’s deputies. As Titus investigates the shootings, he unearths terrible crimes.

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.

Tracy Crosswhite has spent 20 years questioning the facts surrounding her sister Sarah’s disappearance and the murder trial that followed. She doesn’t believe that Edmund House - a convicted rapist and the man condemned for Sarah’s murder - is the guilty party. Motivated by the opportunity to obtain real justice, Tracy became a homicide detective with the Seattle PD and dedicated her life to tracking down killers.

Vera Wong is a lonely little old lady—ah, lady of a certain age—who lives above her forgotten tea shop in the middle of San Francisco’s Chinatown. Despite living alone, Vera is not needy, oh no. She likes nothing more than sipping on a good cup of Wulong and doing some healthy detective work on the Internet about what her Gen-Z son is up to. Then one morning, Vera trudges downstairs to find a curious thing—a dead man in the middle of her tea shop.

When Anna Bradshaw wakes up in a hospital bed in London, she remembers nothing, not even her loving husband, Stephen. The doctors say her amnesia is to be expected, but Anna feels cut adrift from her entire life. In Bristol, Livvy Nicholson is newly married to Dominic and eager to get back to work after six months’ maternity leave. But when Dominic’s estranged mother appears, making a series of unnerving claims, Livvy is sucked into a version of herself she doesn’t recognise.

Edwin St. Andrew is eighteen years old when he crosses the Atlantic by steamship, exiled from polite society following an ill-conceived diatribe at a dinner party. He enters the forest, spellbound by the beauty of the Canadian wilderness, and suddenly hears the notes of a violin echoing in an airship terminal—an experience that shocks him to his core.

Adelaide Hills, Christmas Eve, 1959. At the end of a scorching hot day, a local deliveryman makes a terrible discovery. A police investigation is called, and the small town of Tambilla becomes embroiled in one of the most shocking and perplexing murder cases in the history of South Australia. Many years later and thousands of miles away, Jess is a journalist in search of a story. Having lived and worked in London for nearly two decades, she now finds herself laid off from her full-time job and struggling to make ends meet. Until a phone call out of nowhere summons her back to Sydney.

Northern Ireland, spring 1981. Hunger strikes, riots, power cuts, a homophobic serial killer with a penchant for opera, and a young woman’s suicide that may yet turn out to be murder: on the surface, the events are unconnected, but then things—and people—aren’t always what they seem. Detective Sergeant Duffy is the man tasked with trying to get to the bottom of it all. It’s no easy job—especially when it turns out that one of the victims was involved in the IRA but was last seen discussing business with someone from the loyalist Ulster Volunteer Force.

On Christmas Eve, DCI Mackenzie Jones is called to a shooting at a remote farmhouse. Ralph Mallender believes his father lies dead inside. When three more bodies are discovered, it's clear a festive family gathering has turned into a gruesome tragedy. At first it seems like an open and shut case: a murder suicide committed by Ralph's volatile brother Cameron. Then new evidence makes Mack suspect the man who reported the crime is in fact the perpetrator. But Mack isn't the only one with a stake in the case.