In 1947, having abandoned his faith, Father Merrin joins an archaeological excavation in Kenya, where an ancient church has been unearthed and something much older waits to be awoken.

Decades before Father Merrin helped save Regan MacNeil's soul, he first encounters the demon Pazuzu in Kenya. Merrin's initial battle with Pazuzu leads to the rediscovery of his faith.

When a mysterious entity possesses a young girl, her mother seeks the help of two Catholic priests to save her life.

When a mysterious entity possesses a young girl, her mother seeks the help of two Catholic priests to save her life.

When his daughter and her friend show signs of demonic possession, it unleashes a chain of events that forces single father, Victor Fielding, to confront the nadir of evil. Terrified and desperate, he seeks out the only person alive who's witnessed anything like it before.

Fifteen years after the original film, the philosophical Lieutenant William F. Kinderman is investigating a baffling series of murders on Georgetown that all contain the hallmarks of The Gemini, a deceased serial killer. His investigation eventually leads him to a catatonic patient in a psychiatric hospital who has recently started to speak, claiming he is The Gemini and detailing the murders, but bears a striking resemblance to Father Damien Karras.

A teenage girl once possessed by a demon finds that it still lurks within her. Meanwhile, a priest investigates the death of the girl's exorcist.