Mondo Keyhole is a 1966 film directed by Jack Hill in his directorial debut.

A sexploitation drama, it covers themes such as the pornography business, drug-taking, rape, martial arts and revenge.

[1] Howard Thorne is a rapist in Los Angeles: he meets women at work and at parties or he sees them walking down the street, and he follows them, terrifies them, and assaults them.

He ignores his heroin-using wife, Vicki, who tries everything she can think of to get his sexual attention.

Howard and Vicki go separately to a costume party where she learns the full truth about his nature and where he is stalked by one of his recent victims.