Jessica Barrett, a seemingly ordinary wife and mother living in San Francisco, suddenly finds her life turned upside down when she becomes mysteriously and frighteningly pregnant. Her condition defies all medical explanations, plunging her and her family into a nightmare. As Jessica's husband Robert and their two children struggle to cope with her increasingly erratic behavior, they begin to witness horrifying and inexplicable events around their home. Unbeknownst to them, a sinister force is at play, as Jessica begins to exhibit supernatural abilities and disturbing changes that suggest a presence within her that seeks control.

In parallel, an enigmatic man named Dimitri, who shares a tumultuous and secretive past with Jessica, emerges with his own hidden motives related to her current plight. As Dimitri's true intentions unfold, it becomes clear that he may hold the key to understanding the terrifying events surrounding Jessica's pregnancy. The tension escalates as Jessica's transformation endangers everyone around her, leading to a climactic confrontation where the true nature of the evil within her is revealed. The battle for Jessica's soul becomes a fight for survival, with stakes that are both deeply personal and profoundly cosmic.