Two brothers, scientists Scott and Tony Nelson, develop an amplifier that enables a person to enter a 4-dimensional state, which allows him to pass through any object. Scott experiments on himself and discovers that each time he passes through something he ages rapidly. He begins killing people, sucking out their life energies and regaining his youth as a result. It falls to Tony and Scott's girlfriend Linda to try to put a stop to his murderous rampage.—Doug Sederberg