Tucked away among Devon's rolling green hills, Mallowan Hall combines the best of English tradition with the modern conveniences of 1930. Housekeeper Phyllida Bright, as efficient as she is personable, manages the large household with an iron fist in her very elegant glove. In one respect, however, Mallowan Hall stands far apart from other picturesque country houses. The manor is home to archaeologist Max Mallowan and his famous wife, Agatha Christie.

Iris Woodmore is a journalist with a hot new story. For the first time in history, two women compete in a by-election to become the third woman elected to Parliament. Iris accompanies one of the candidates to a debate in the House of Commons. But it's a place that holds painful memories. In 1914, Iris' mother died there when she fell into the River Thames during a daring suffragette protest. In the shadow of Big Ben, a waterman tells Iris her mother didn't fall - she jumped.

Evelyn Christie has resigned herself to another long, boring weekend at Hessleham Hall, the home of her husband, Tommy's, family. However, it turns out to be anything but dull when his uncle, the Earl of Northmoor, is shockingly murdered! Evelyn must use all of her sleuthing knowledge, gained whilst she was a member of the Police force during the war, to find out who the murderer is before the bungling local police force decide the Earl was bumped off so Tommy could inherit his title.

Hours later, the man’s cold body lies in the city mortuary, alongside the woman he couldn’t save. And his sister, unconventional nurse Gemma Tate, tracks down troubled police inspector Sebastian Bell to unravel the truth. Sebastian has enough pressure to solve the murder of an aristocratic heiress without Gemma meddling in his case. But the cryptic sentences she brings him from her brother’s notebook could be a crucial lead. If only they knew what “milky way” meant.

London, 1861. Samantha Kingston has lived under the control of her overbearing uncle since the death of her parents six years ago. Trapped by the conventions of her gender and social class, she is desperate to find a way out. But when her aunt and uncle are murdered, the freedom she sought seems even further out of reach. A suspect in the crime, she finds herself on the run, unsure whom to trust, lost in the underworld she had only ever read about in the pages of a Dickens novel.

Two little girls stand with their heads bowed in my living room. I’m told they’re my granddaughters. Daisy is nine, and Alice seven. Daisy is the spitting image of her mother. This is the first time I’ve met them since my daughter and I fell out after she married that waste of space, Vince. They’ve come to live with me because their mother — my daughter — was murdered. In her own home while they slept close by. I think Vince killed her. But the police can’t prove it. I’ve always known he was no good. He treated my daughter like dirt. I said he’d cheat on her — but she wouldn’t listen.

Lowen Ashleigh is a struggling writer on the brink of financial ruin when she accepts the job offer of a lifetime. Jeremy Crawford, husband of best-selling author Verity Crawford, has hired Lowen to complete the remaining books in a successful series his injured wife is unable to finish. Lowen arrives at the Crawford home, ready to sort through years of Verity's notes and outlines, hoping to find enough material to get her started. What Lowen doesn't expect to uncover in the chaotic office is an unfinished autobiography Verity never intended for anyone to read.

Who is Audrey Hoedemaker? It's a question her sister Maureen has heard more times than she can count, and she doesn't know what the short answer would be. Little sister, troubled teen, backpacker, musical theatre coach, con artist, childcare worker. Murderer. A tragic, traumatic childhood casts a long shadow on the Hoedemaker sisters. Maureen has worked hard to move beyond the violence of the past and build a good, honest life for herself. Audrey, however, just can't seem to do the same, careening from one state of chaos to another.

After the killing of a prominent mob lawyer, NYPD homicide detectives Jacob Jackson and Caitlin Grimes start receive chilling, written “rules” for how to commit the perfect murder. "Rule number one for the perfect murder: Evidence is your enemy. Leave none behind." Jackson (Reid Scott) and Grimes (Cobie Smulders) race to find the killer, setting them on a collision course with the city’s crime underbelly, and a perpetrator who seems happy to toy with them. “Rule number two. No crimes of passion. The perfect murder is always business, never pleasure.”

Kidnappers grabbed Jenna in broad daylight, right in front of her children and their horrified classmates. Her family was issued an insane ransom demand: $25 million in cash and jewels, payable by the end of the school day, otherwise they’ll never see her again. As Jenna’s mother scrambles to gather the money, detectives Mo Butler and George Ortega follow the trail of the kidnappers, which will lead them through a sordid landscape of jealous lovers, broken dreamers, and twisted schemers. But every second counts, and there’s one thing Jenna Wade doesn’t have: very much time.