One of Fred Williamson's more unusual efforts as both actor and director, this one features the action star as a cigar-smoking detective named Mac Derringer. He is enlisted by his ex-wife (Vanity), a phone-sex operator, to catch the masked psychopath who murdered her co-worker. With the aid of partner Gary Busey and friend Peter Fonda, Derringer closes in on the maniac, but is soon framed for murder. Williamson has an interracial love scene, there's a stoolie who raps, and a subplot involves blackmail and pornography. The Jeffersons' Isabel Sanford appears as Derringer's mother, and the familiar genre cast features Stella Stevens, Robert Forster, and Henry Silva.