Left on a train platform in an unfamiliar village, Saffron Faith Anders is certain her father will return shortly, like he promised. She holds out hope even as the hours pass and the station grows dark. When a strange old woman with a large umbrella approaches and inquires about her situation, Saffron doesn’t immediately trust the imposing do-gooder, but with the chances of her father returning growing ever slimmer, she agrees to rest at the old woman’s house. Her stay was supposed to be for a few minutes, but Saffron soon realizes she has been confined to a house of dark secrets.

Ever since Fern could remember, she and her mother have lived as servants in Wyndemere House, the old Gothic mansion of the Davenport family. She may have been a servant, but Fern developed a sweet friendship with Dr. Davenport's son, Ryder, and she was even allowed free range of the estate. But Dr. Davenport has remarried, and his new wife has very different ideas about a servant's place. Yet, for all her wrath, the cruel woman cannot break the mysterious bond between Ryder and Fern.

Caroline Bryer is the daughter of a very conservative TSA agent and former military brat, Morgan Bryer. Her mother, Linsey Bryer, is a descendent of the Sutherland real estate family. Their organized, suburban life in Colonie, New York is rigorously regulated and leaves little room for deviation from the norm. When Linsey, Morgan, and Caroline attend the wake of their neighbor Mr. Gleeson, they meet his charming daughter Natalie “Nattie” Gleeson, who works for the American ambassador to France. Linsey and Nattie strike up a fast friendship.

Pru Dunning has everything she ever wanted: a successful boyfriend, a thriving nursing career, and a truly comfortable life. But then the strange voicemails start. Scarletta, the woman calls herself. She seems to know Pru, although Pru certainly doesn't know that name, nor does she recognize the glamorous voice leaving her poisonous messages. Pru begins to carefully investigate. But when she suddenly becomes a person of interest in a murder case, it feels like Scarletta’s toxic voice, lashing out from the shadows, will silence all beauty in Pru’s perfect life, once and for all.

Elle Edwards, who has been told she's a product of her mother's sinful mistake, has never gone to school, never met a teenager her own age, never even been allowed off of her grandparents' property. Convinced that their granddaughter is infected with evil, Myra and Prescott Edwards believe that only the harshest child-rearing methods will prevent Elle from becoming an instrument of the devil.