Elena Michaels is the world’s only female werewolf. And she’s tired of it. Tired of a life spent hiding and protecting, a life where her most important job is hunting down rogue werewolves. Tired of a world that not only accepts the worst in her–her temper, her violence—but requires it. Worst of all, she realizes she’s growing content with that life, with being that person.

Sixteen-year-old werewolf twins Kate and Logan Danvers are none too thrilled at being shipped off to a supernatural youth leadership conference in West Virginia. From the moment they arrive at the camp, the twins sense something is off, and they react in their usual manner - Logan reserving judgment and surveying the setup while Kate charges forward, determined to get answers. Kate and Logan quickly ascertain that most of the conference attendees have already formed hostile factions, leaving the twins and a few other misfits to band together.

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.

Kennedy Bennett comes from a long line of curse weavers. For centuries, her family has plied their trade in Unstable, Massachusetts, an unconventional small town that's welcomed paranormal practitioners since the dawn of spiritualism. Kennedy has recently struck out on her own, opening an antiques shop in Boston, where her specialty is uncursing and reselling hexed objects. Then Aiden Connolly walks into her life with an offer she really should refuse. The scion of a wealthy family of luck workers, Aiden has a scheme to get his hands on the most famous cursed object of all.

Someone is killing street kids in the city, and the police have tied Ricky to the crimes. Setting out with Gabriel's help to clear Ricky's name, Olivia once again finds her own life at risk. Soon the three are tangled in a web of betrayals that threatens their uneasy equilibrium and is pushing them toward a hard choice: either they fulfill their destinies by trusting each other and staying true to their real bonds, or they succumb to the extraordinary forces trying to win an eternal war by tearing them apart.