Peter Sellers and Goldie Hawn star in this adaptation of Terence Frisby's hit stage comedy. After being ditched by her sexually-liberated boyfriend, Hawn's American doe-eyed flowerchild Marion is forced to crash at the bachelor pad of Robert Danvers, star of a popular gourmet-cooking programme and a notorious London swinger. A committed Casanova, Danvers' life is turned upside down when, to his surprise, he finds himself falling in love with his winsome house guest.