In a small, devout community in Haiti, Father Marc (Lafortune Joseph), a respected exorcist, faces his most challenging case yet when a series of disturbing events suggest a powerful demonic presence has taken hold. The unsettling phenomena center around a local orphan, Claudine, whose serene demeanor belies the malevolent force that seems to have attached itself to her. As Father Marc delves deeper into the mystery, he enlists the help of his mentor, Father Louis (Gastner Legerme), whose extensive knowledge of ancient rituals may hold the key to battling the darkness.

Complications arise when Dr. Daniel (Leslie Odom Jr.), a pragmatic and skeptical psychiatrist from the United States, arrives, intent on providing a scientific explanation for the occurrences that grip the village in fear. As the two men of faith—the believer and the skeptic—clash over ideology and methodology, the malevolent presence grows stronger, threatening to consume Claudine and spread beyond her. In a race against time, Father Marc must confront his own doubts and the community's growing distrust to save Claudine and his parishioners from an evil that defies both science and religion.