April 1910. Women's rights activist Alvera Fields mysteriously vanishes from her home one night, leaving her newborn baby and husband behind, and the case is never solved.

April 2021. On the anniversary of her great-great-grandmother's disappearance, Alvera's namesake, Vera Portman, vanishes in an eerily similar manner. Six months later, the police recover a girl's body. While the family waits, afraid to find out it's Vera, Felicity Portman clings to hope that her missing teenage daughter is still alive. Despite all odds, Felicity senses a link between the decades-apart cases — a mother feels such things in her bones. But all suspicion points to the last person who saw Vera alive: Felicity's sister-in-law, Marin.

Marin, with her troubled past. Marin, the poor woman who married into the rich family. Marin, the only one who knows Felicity's darkest secret. As Felicity makes a shocking discovery in Vera's journal, she questions who her daughter really is. The deeper she digs, the more she's ensnared in the same mysteries that claimed their ancestor in a terribly slow ruin.