It’s Mallory Atkinson’s first Christmas in Scotland. Victorian Scotland, that is. Also, as the twenty-first-century detective learns, Christmas really isn’t a thing in Victorian Scotland. It’s all about Hogmanay. But her boss, Dr. Duncan Gray, treats her to an early gift of tickets to the event of the season: a Charles Dickens reading. There, they bump into Lady Inglis—the lovely widow who has sent Gray sexy letters trying to entice him back to her bed.

After slipping 150 years into the past, modern-day homicide detective Mallory Atkinson has embraced her new life in Victorian Scotland as housemaid Catriona Mitchel. Although it isn’t what she expected, she's developed real, meaningful relationships with the people around her and has come to love her role as assistant to undertaker Dr. Duncan Gray and Detective Hugh McCreadie. Mallory, Gray, and McCreadie are on their way to the Scottish Highlands for McCreadie's younger sister's wedding.

May 20, 2019: Homicide detective Mallory is in Edinburgh to be with her dying grandmother. While out on a jog one evening, Mallory hears a woman in distress. She’s drawn to an alley, where she is attacked and loses consciousness. May 20, 1869: Housemaid Catriona Thomson had been enjoying a half-day off, only to be discovered that night in a lane, where she’d been strangled and left for dead. When Mallory wakes up in Catriona's body in 1869, she must put aside her shock and adjust quickly to the reality.

Thorne Manor has always been haunted...and it has always haunted Bronwyn Dale. As a young girl, Bronwyn could pass through a time slip in her great-aunt's house, where she visited William Thorne, a boy her own age, born two centuries earlier. After a family tragedy, the house was shuttered and Bronwyn was convinced that William existed only in her imagination. Now, 20 years later Bronwyn inherits Thorne Manor. And when she returns, William is waiting.

Nicola Laughton never expected to see adulthood, being diagnosed with Cystic Fibrosis as a child. Then medical advances let her live into her thirties and she met Anton, who taught her to dream of a future… together. Months after they married, Anton died in a horrible car crash, but lived long enough to utter five words to her, “I’ll be waiting for you.” That final private moment became public when someone from the crash scene took it to the press—the terminally ill woman holding her dying husband as he promised to wait for her on the other side.

Blythe and her friends — Gabrielle, and brother and sister Tucker and Tanya — have always been a tight friend group, attending a local high school and falling in and out of love with each other. But an act of violence has caused a rift between Blythe and Tucker . . . and unexpected bursts of aggression and disturbing nightmares have started to become more frequent in their lives.

When Amy Gibson's mother is brutally murdered by her boyfriend, Amy's world is completely undone. Overcome with grief and heartache, she withdraws from everything around her—college, her friends, her entire life. Until her estranged half-brother, Oliver, saves her, pulling her back into her life and giving her family. Giving her a home.

Casey Duncan is a homicide detective with a secret: When she was in college, she killed a man. She was never caught, but he was the grandson of a mobster, and she knows that someday this crime will catch up to her. Casey's best friend, Diana, is on the run from a violent, abusive ex-husband. When Diana's husband finds her, and Casey herself is attacked shortly after, Casey knows it's time for the two of them to disappear again. Diana has heard of a town made for people like her, a town that takes in people on the run who want to shed their old lives.

Strange things are happening in Maya's tiny Vancouver Island town. First, her friend Serena, the captain of the swim team, drowns mysteriously in the middle of a calm lake. Then, one year later, mountain lions are spotted rather frequently around Maya's home and her reactions to them are somewhat . . . unexpected. Her best friend, Daniel, has also been experiencing unexplainable premonitions about certain people and situations.

Genevieve has secrets that no one knows. In Rome she can be whoever she wants to be. Her neighbours aren't nosy; her Italian is passable; the shopkeepers and restaurant owners now see her as a local, and they let her be. It's exactly what she wants. One morning, after getting groceries, she returns to her 500-year-old Trastevere apartment - it's exactly as she left it, not a thing out of place...except for the small box on her kitchen table. A box that definitely wasn't there this morning. A box that is addressed to "Lucy Callahan." A name that she hasn't used in 10 years.