Isla Hansen, a mother reeling from a devastating loss, is beside herself when a mysteriously orphaned child appears on the outskirts of the Hansens’ secluded Colorado property. Although strange and unexplainable, the child’s presence breathes new life into Isla. But as the child settles in, Isla’s husband, Luke, and their five children notice peculiarities that hint at something far beyond the ordinary—anomalies that challenge the very fabric of reality itself.

In 1765, plague sweeps through Zacatecas. Alba flees with her wealthy merchant parents and fiancé, Carlos, to his family’s isolated mine for refuge. But safety proves fleeting as other dangers soon bare their teeth: Alba begins suffering from strange hallucinations, sleepwalking, and violent convulsions. She senses something cold lurking beneath her skin. Something angry. Something wrong.

After a heart-wrenching breakup with her girlfriend and a shocking incident at her job, Cassie flees her life as an overworked assistant in New York for her hometown in New Jersey, along the Delaware. There, she reconnects with her high school best friend, Eli, now a widowed father of two. Their bond reignites, and within a few short months, Cassie is married to Eli, living in his house in the woods, homeschooling the kids, and getting to know her reserved neighbor, Joan. But Cassie’s fresh start is less idyllic than she’d hoped.

The Baroness, an infamous exploitation film long thought destroyed by Nazi fire, is discovered fifty years later. When lonely archivist Ellen Kramer—deeply closeted and pathologically repressed—begins restoring the hedonistic movie, it unspools dark desires from deep within her. As Ellen is consumed by visions and voices, she becomes convinced the movie is real, and is happening to her—and that frame by frame, she is unleashing its occult horrors on the world. Her life quickly begins to spiral out of control.

Aymar Castle has been under siege for six months. Food is running low and there has been no sign of rescue. But just as the survivors consider deliberately thinning their number, the castle stores are replenished. The sick are healed. And the divine figures of the Constant Lady and her Saints have arrived, despite the barricaded gates, offering succor in return for adoration. Soon, the entire castle is under the sway of their saviors, partaking in intoxicating feasts of terrible origin.