There is tension between two kinds of stories in "The Red Shoes," and that tension helps make it the most popular movie ever made about the ballet and one of the most enigmatic movies about anything. One story could be a Hollywood musical: A young ballerina falls in love with the composer of the ballet that makes her an overnight star. The other story is darker and more guarded. It involves the impresario who runs the ballet company, who demands loyalty and obedience, who is enraged when the young people get married. The motives of the ballerina and her lover are transparent. But the impresario defies analysis. In his dark eyes we read a fierce resentment. No, it is not jealousy, at least not romantic jealousy. Nothing as simple as that.