Joanna Sorrin, a whimsical and fanciful country girl, goes to London to follow a fashion design course. She comes into contact with the capital's young jet set and becomes the mistress of Gordon, the black owner of a night club. Unfortunately her lover happens to kill a man and is sent to jail. As she is pregnant from Gordon, Joanna returns to her parents'home. But the young woman has not yet said her last word. She WILL be back in Swingin' London !