After a series of disturbing supernatural events begin plaguing his home, Joel, a struggling single father, starts to suspect that his young son, Mason, may be possessed by a demonic entity. Grappling with his own mental health issues, Joel finds himself questioning what's real and what might be a product of his imagination. Desperate for answers and fearing for his son's soul, he reluctantly seeks the help of Father Lambert, a disgraced priest with a troubled past involving a failed exorcism. As the terrifying manifestations escalate, Joel must confront the possibility that his son is truly marked by evil, leading him down a harrowing path to save Mason from a dark and irreversible fate.