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.

Librarian Sylvia Ashe knows nothing about her past, having grown up without a father and a mother who refused to discuss him. When she stumbles upon a diary that suggests she's descended from magicians, she's skeptical. After all, magicians are special, and she's just an ordinary woman who loves books. She seeks answers from a member of the most prominent family of magicians, but she quickly learns that finding the truth won't be easy, especially when he turns out to be as artless as her, and more compelling and dangerous than books.

Xanthe has always had an affinity with some of the antiques she finds. When she touches them, she can sense something of the past they come from and the stories they hold. When she has an intense connection to a beautiful silver chatelaine, she has to know more. It is while she’s examining the chatelaine that she’s transported back to the 17th century, where it has its origins. She discovers there is an injustice in its history. The spirit that inhabits her new home confronts her and charges her with saving her daughter’s life, threatening to take Flora’s if she fails.

Archaeology grad student Alexandra Larson’s world is turned upside down when her mother shares her deepest, darkest secret - that she doesn’t know the true identity of Lex’s father. The revelation sparks a change within Lex, and her dreams become far too real. She sees things she shouldn’t be able to see…knows things she couldn’t possibly know. Terrifying things. Deadly things.

The ultimate cure that could heal any disease? Crazy. That's exactly what research scientist Marian Creighton has always believed about her father's quest, even if it does stem from a desire to save her sister Ellen from the genetic disease that stole their mother from them. But when her father falls into a coma after drinking a vial of holy water believed to contain traces of residue from the Tree of Life, Marian must question all of her assumptions. He's left behind tantalizing clues that suggest he's crossed back in time.