The player takes the role of Keiji Thomas, a man in a Keikogi and slippers. Thomas's girlfriend, Sylvia, has been kidnapped by "Mr. X", and Thomas must fight through five side-scrolling floors full of enemies to rescue her. Complete the five floors by beating all the Grippers and Knife throwers. Punches are worth twice as much as kicks and do twice as much damage, but their range is shorter.