Oscar Collins (
Jack MacGowran) is a professor who specializes in the behavior and collecting of butterflies. One day, he discovers he can watch his beautiful neighbor Penny (
Jane Birkin) through a crack in the wall of his apartment. He is soon overtaken by his voyeuristic tendencies and engages in a series of psychedelic daydreams as he watches the beautiful woman in various stages of her life and lovemaking. The musical score is provided by
George Harrison. ~ Dan Pavlides, All Movie Guide