Master mechanic Rick (Ken Wahl) loses his brother to a homicidal maniac who kills motorists at random in his "Death Car". After a run in with a gang of punks who destroy his truck, Rick decides to become a vigilante. He converts his pick-up into an armed and dangerous vehicle. Hunting down reckless drivers he leaves them handcuffed for the police to find. The police are after this 'Gladiator', but Rick won't let up until he finds his brother's assassin, 'Skull'. When the two meet, it's a duel to the death and maybe an end to Rick's career as the vigilante Gladiator.