A team of amateur ghost hunters, disheartened by their failure to gather concrete evidence after several months, chooses to challenge and provoke spirits from the beyond in a final effort to experience the supernatural. Their risky experiment succeeds, but they inadvertently stir up a furious and lethal entity that begins to haunt them. This malevolent force follows them back to their homes, refusing to depart. Now, the investigators are forced to protect their households and loved ones from these spirits, who have been summoned into this realm and are determined to claim some souls before leaving.