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.

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.

Deep in the Yukon wilderness, a town is being built. A place for people to disappear, a fresh start from a life on the run. Haven’s Rock isn’t the first town of this kind, something detective Casey Duncan and her husband, Sheriff Eric Dalton, know firsthand. They met in the original town of Rockton. But greed and deception led the couple to financing a new refuge for those in need. This time around, they get to decide which applicants are approved for residency.

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.

From Atlanta's wealthiest suburbs to its stark inner-city housing projects, a killer has crossed the boundaries of wealth and race. And the people who are chasing him must cross those boundaries, too. Among them is Michael Ormewood, a veteran detective whose marriage is hanging by a thread and whose arrogance and explosive temper are threatening his career. And Angie Polaski, a beautiful vice cop who was once Michael's lover before she became his enemy.