After being wrongfully executed in the electric chair, Charles Forsyth’s spirit lingers in the prison where he met his end. Years later, the facility is reopened under the leadership of Eaton Sharpe, a former guard who had falsely accused Charles. As inmates are tasked with demolishing the wall to the execution chamber, they inadvertently unleash Charles’s vengeful ghost. This formidable entity spreads his wrath throughout the prison, ultimately targeting the Warden.