The Anthony Newley/Leslie Bricusse London and Broadway musical hit Stop the World, I Want to Get Off is given literal treatment in this filmization. Newley stars as Littlechap, whose allegorical rise to success is countered by the instability of his private life. Like the play, the film is staged impressionistically, with Newley decked out in mime makeup and periodically stopping the action to address the audience, and with all the women in his life -- German, American and "Typically English" -- played by a single actress (Millicent Martin, taking over from the stage version's Anna Quayle). In Wizard of Oz fashion, the play itself is lensed in color, while the brief prologue, showing the actors preparing for their performance, is in black-and-white. The production includes such standards (and perennial audition pieces) as What Kind of Fool Am I? and Gonna Build a Mountain.

Heironymus Merkin is an internationally successful singer approaching middle age who retells his life story in a series of production numbers on a seashore in front of his two toddlers and aged mother. Merkin's promiscuous relationships with women are explored, particularly Polyester Poontang and the adolescent Mercy Humppe. Merkin is constantly surrounded by a Satan-like procurer, Goodtime Eddie Filth, and an angelic 'Presence' who interrupts Merkin's biography with cryptic Borscht Belt-level jokes to denote births and deaths in Merkin's life. Newley periodically steps out of character to complain about his 'Merkin' role with an unseen director, two screenwriters, the film's producers and a trio of blasé movie critics who are turned off by the story's eroticism and lack of plot.