美国飞车党是一有组织的犯罪集团,FBI找来史东渗入飞车党卧底,史东很快博取有爪牙信任,为了搜取证据引诱南茜合作,希望能指证飞车党杀警越货的证据,不幸南茜事发身亡,史东也成为人质,州政府欲将爪牙处死,首领欲劫狱救出爪牙,史东终将首领绳之于法。Joe Huff is a tough, go-it-alone cop with a flair for infiltrating dangerous biker gangs. The FBI blackmail Joe into an undercover operation to convict some extremely violent bikers, who are angry at the capture of their leader.