It is a full moon on a summer night. In the heart of Paris, in St. Germain des Près, a moonlight ball is being held. Musicians play in the streets and people, dressed in their finery, bow and curtsey to take hands before the dancing beginsl. Onlookers watch with joy and fascination and everywhere people rejoice in the cool light of the full moon as it casts its long shadows over the people, the trees and the buildings.