Working as a humble cobbler, The Optimist is thrown into an international world of crime and classical ballet when a diamond is stolen - the famous Light Fantastic. Olga is on the run from incompetent thugs when she hides the stone in her ballet shoe and draws The Optimist into a convoluted plot that leads to him on stage dancing the pas-de-deux in Tchaikovsky's Swan Lake. By the end he finds alone himself alone in the theatre - unknowingly still in possession of the fabulous diamond