In the lead-up to the Salem witch trials, a desperate man made a deal with the devil - a deal that would drag two families down with him. Now, over 400 years later, the Steadfasts and the Prynnes remain caught in a curse that sentences both families to an existence of rigid rules, torturous consequences, and half-lives. Lucy Prynne and Ashes Steadfast are the latest to take on the mantle of this centuries-old deal: Lucy, born to try to reap the souls of the hopeful; and Ashes, born to stop Lucy, no matter the cost. But before they inherited their respective curses, it sure felt like Ash's purpose was Lucy. Her best friend, her closest confidant, her true love. Ash knows the rules. She keeps her head down, her emotions in check, and she fights Lucy, no matter the personal cost. They are doomed to an incessant battle between good and bad, self-righteous and carnal. Or so Ash thinks. But when she resists her instincts to fight Lucy and finally starts to fight the curse instead, she realizes there might just be a way to end this once and for all. If not in this timeline, then the next. As generational secrets begin to unravel, Ashes and Lucy join forces against the true threat that has haunted their families for centuries, even if it costs them their lives - and their love.