An American manager and his daughter want to hire "the little singers with the wooden cross" for a tour of the United States,but Jeannot,a young member of the choir recognize his grandma's locket round the girl's neck and asks for it.He's punished .Cesarin ,Napoleon 's companion visits him ,he was put in charge of giving the jewel to the King of Rome .With a little help from a supervisor,Jeannot tries to get it back;the search will take him all across the land .