On a dark and foggy night, a group of academics embarks on an investigation into paranormal phenomena in a small town in England. Upon arrival, they encounter a mysterious ritual involving demons and black magic, leaving everyone with a sense of unease. Among them is the skeptical Dr. John Holden, who doubts the existence of the supernatural but will be forced to reassess his beliefs when he comes face to face with the unsettling figure of a cult that worships an ancient entity.
As the group delves deeper into their research, strange events begin to unfold: inexplicable lights, terrifying visions, and a growing atmosphere of tension. The environment becomes oppressive, and the lines between science and the paranormal blur. Trapped in this psychological thriller, Holden tries to unravel the truth behind an ancient book that seems to hold the key to eradicating the evil lurking in the town.
However, as the night progresses, the revelation of a dark secret about the place's past and its connection to the cult leads them to a deadly confrontation. With time running out, Holden and his group must confront their own fears if they hope to escape the nightmare that lurks in the darkness. The struggle between reason and superstition becomes a final battle that will challenge everything they thought they knew.