Two ex-football players concentrate on living the good life in Miami. In their spare time, they're private eyes, but their partying lifestyles are thrown for a loop when they accept a mysterious challenge from an exotic beauty... Fred Williamson 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.