Ma aspires to be an inventor, but his interest alienates his girlfriend. To salvage the relationship, Ma determines to change his ways. But he mistakenly joins a gang of killers, which is thought to be a beauty parlor. Once he is ordered to kill a man ...馬德忠立志成為發明家，女友婷婷對他的發明卻不感興趣。德忠發現婷婷近來經常與理查約會，懷疑女友另結新歡。他為了挽回這段感情，堅決改變自己，誤打誤撞加入殺手組織「型到爆」。一天，德忠奉命刺殺孖西哥。激戰過後，他……
