Sledge Hammer is a no-nonsense cop whose best friend is his .44 Magnum, and who just loves to use excessive force to collar criminals. In the opener, the mayor's daughter is kidnapped, and Hammer vows to bring her back -- "dead or alive."

Hammer's search for a jewel thief leads to an upscale beauty salon, where henchmen rob the society matrons’ homes during their hair appointments. Hammer goes undercover as a hairdresser in order to stop the British thieves who are after the ladies' jewels.