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.

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.

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.

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.

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.