Following the brutal rape of a young woman by a gang of construction workers, a mysterious figure wearing a motorcycle helmet and driving a gold hearse begins hunting the perpetrators down. The masked avenger's weapon of choice, obviously, is a nail gun, with which he (or could it be she?) takes out the rapists one by one. Just who is this murderous vigilante?

Young filmmakers trying to hawk a movie titled "Bradykillers" about a serial killer who goes after victims Marcia, Jan, and Cindy meet their screen idol, William Shatner. The two young men, who idolize him and in their fantasies have seen him as a shadowy fairy godfather figure, are alarmed at the reality of the middle-aged non-Captain Kirk man that they meet.