Jack Brooks (Trevor Matthews) is an unremarkable and unlucky plumber who still has a shadow in his heart when he saw his relatives brutally murdered in his childhood. Although he has a blonde as his girlfriend, he is still worried about things. One day, the confused Jack accidentally exposed the water pipe, and an old object reappeared in the world. Gordon (Robert Englund), Jack's night school professor, finds a beating black heart during the examination. Then the heart drilled into Professor Gordon's mouth. The controlled professor turned into a terrible demon and began to kill the people around him on a large scale. The situation is extremely urgent. As a result of the accidental mistake released such a terrible devil, Jack decided to eradicate the demon himself.