Secret Service agent Hanson escapes a satanic ritual only to succumb to his injuries, leaving behind photographic evidence of powerful public figures involved in a dark conspiracy. Professor Lorrimer Van Helsing identifies the missing presence in the photos as Count Dracula, who now plans to unleash a weaponized strain of bubonic plague upon the world. As the investigation leads to the sprawling Pelham House, Inspector Murray and Jessica Van Helsing infiltrate the estate to confront the cult's influence. The tension escalates as the conspirators discover the true purpose of the deadly virus, leading to a frantic battle for control.