Angela Holmes is an ordinary 27-year-old woman living in the suburbs when she begins to experience unsettling and dangerous disturbances. Her bizarre behavior escalates from harmless oddities to violent episodes that harm those around her. Angela’s boyfriend, Pete, and her father, Roger, are deeply concerned and seek medical advice, but doctors are stumped by her symptoms. After a car accident and a bird attack further complicate matters, Angela is placed under psychiatric care where her condition only deteriorates further. As occurrences of intense blackouts and supernatural phenomena increase, it becomes evident that something more sinister is at play.

Father Lozano, a local priest, is called in to offer spiritual guidance and soon suspects that Angela may be dealing with a demonic possession. Together with Vatican officials who specialize in exorcisms, Father Lozano attempts to determine the nature of the evil inhabiting Angela. During their investigation, patterns tied to historical events and prophecies emerge, suggesting that Angela’s possession could have far-reaching consequences. Torn between faith, medical science, and the safety of the people involved, Father Lozano and his team must race against time to confront the ancient force within Angela before it brings about cataclysmic destruction.