When FBI Agent Zack Stewart is killed, Agent John Ripley takes over the three cases he was working on, hoping one will lead to his killer. The first involves gangster Joe Walpo and Ripley finds his hideout through Joe's girl friend, Connie Anderson. Joe is killed but it is established he was 400 miles away when Stewart was murdered. The next involves a car-theft gang which Ripley breaks up by using one of the gang, Vince Angelino and his wife Julie. The last case involves Kate Martell, the victim of an extortionist who threatens to kidnap her child unless she pays him $10,000,怪不得后背会有灸痛,刚才若不是反应及时逃开了,只怕现在也像蜘蛛人一样成烤蜘蛛了,那些捆绑丧尸首领的蛛丝早已经融化,非但是蜘蛛人遭了毒手,还有附在丧尸身上不停撕爪的鸡人,他更惨,直接被火焰喷出去,整个人……