A paranormal researcher named Mary Florescu investigates the mysterious and violent deaths that occurred in a supposedly haunted house. She enlists the help of a psychic medium, Simon McNeal, to communicate with the spirits that are believed to be trapped there. As they delve deeper into the house's dark history, Simon starts experiencing terrifying visions and encounters that suggest the presence of restless and vengeful entities. Strange occurrences and inexplicable phenomena begin to unfold, heightening the tension for both Mary and Simon, who are skeptical of each other's motives.

As their investigation progresses, they uncover chilling secrets about the house's former occupants and the tragic events that led to its haunting. The line between the living and the dead becomes increasingly blurred, creating a pervasive atmosphere of dread. Mary and Simon's professional relationship turns volatile as they confront malevolent forces and struggle to maintain their grip on reality. The situation escalates, leading to a dramatic confrontation that opens the gateway to unimaginable horrors.