In a secluded hospital, an entity unleashes a chain of terrifying events starting with the death of a cult leader during surgery. This malevolent spirit, filled with rage and seeking revenge, manages to possess a dedicated nurse named Sherri. As she returns to her duties, her behavior turns increasingly erratic and sinister. Her friends and colleagues, oblivious to the supernatural influence, initially chalk her changes up to stress and exhaustion. However, as the body count starts to rise, panic sets in, and it becomes clear that something far more sinister than human error is at play.

Seeking answers, Sherri's boyfriend and fellow nurse uncover the truth behind the cult leader's malevolent grip on her life. With the help of an occult expert, they delve into a world of dark rituals and demonic forces, racing against time to save Sherri from a horrifying fate. The tension escalates as they confront the lurking evil that threatens not only Sherri but also everyone she comes into contact with. The battle between good and evil reaches a crescendo as they strive to exorcise the entity before it's too late, revealing unexpected twists and testing their courage to its limits.