Beyond the Door

Jessica tells her husband Robert, a music executive, in their San Francisco home that she is pregnant. The couple already has two young children, Ken and Gail, making the news shocking to both of them. The revelation sets the stage for a troubling pregnancy that will soon take a dark turn.

A few days later, during Ken's birthday party, Jessica becomes violently ill and vomits in the bathroom. They consult Dr. George Staton, who reveals Jessica is actually about three months pregnant. The discovery contradicts Jessica's belief of being weeks along.

Over the course of her pregnancy, Jessica experiences brutal mood swings and apparent hallucinations. She is awakened by disembodied wheezing, levitates, and the household experiences poltergeist-like phenomena. The escalating symptoms indicate the pregnancy is unfolding at an unbelievable rate.

George confides in Robert that Jessica's pregnancy is progressing unbelievably fast. He arranges for Jessica to spend time with his wife Barbara in the hope she will confide in someone trusted. The arrangement is meant to provide emotional support during a terrifying situation.

Jessica asks for an abortion, but her stance shifts when George agrees to an abortion should the pregnancy threaten her health. She accuses George of murder for even considering it, revealing a volatile moral landscape surrounding the unborn child. The tension deepens as the couple debates the pregnancy's fate.

As Robert is away, the Barrett house becomes a hotbed of supernatural activity that terrorizes Gail and Ken. Jessica's behavior grows increasingly monstrous, including inhuman head twists, wheezing, and violent vomiting that resemble possession. The home is no longer a safe place.

A mysterious man named Dimitri contacts Robert and instructs him to sequester Jessica in the house and keep visitors away. He claims the child will be born, and the isolation begins. The stranger's presence hints at a malevolent plot behind the pregnancy.

Jessica's condition worsens with fever and stomach ailments, rendering her bedridden. Under Dimitri's instructions, George restrains her in a straitjacket to prevent violent outbursts. She alternates between pleading for help and cursing George in a deep, demonic voice.

George arranges medical tests, including brain scans, but none show neurological problems. Meanwhile Jessica's episodes intensify, blurring the line between illness and possession as she speaks and acts in a malevolent voice.

Robert learns that Dimitri is not only a mysterious lover from Jessica's past but also a Satanist who engineered the birth of the Antichrist. The revelation explains the bizarre events as part of a ritualistic plot for his own amusement. The stakes become chillingly clear.

In a violent confrontation, the demonic entity within Jessica turns on Dimitri and murders him, then departs Jessica's body. She immediately gives birth to a stillborn child, signaling the deadly cost of the ritual. The supernatural hold on the household seems to end briefly as tragedy settles in.

Some time later, Jessica joins Robert and the children on a boat ride in the San Francisco Bay. Ken opens a gift — a red toy car identical to the model Dimitri crashed — and his eyes glow green, implying he is the actual Antichrist. The twist hints that the next generation will carry the ominous legacy.