El Aristocrata Solteron, relata el caso de la extrana desaparicion de la rica heredera Hatty Doran. Hija unica del multimillonario Aloysius Doran, se ha esfumado tras su matrimonio con el citado Lord St. Simon, segundo hijo del duque de Balmoral y perteneciente a la mas rancia aristocracia de Inglaterra. A pesar de la poca simpatia que inspira a Holmes el estirado personaje, el caso le interesa, y se hace cargo de el. Como es habitual, resuelve brillante y rapidamente el caso. El supuesto asesinato, en el que esta implicada Flora Millar, una antigua "amiga intima" de Lord St. Simon, se convierte en una romantica aventura en la que, finalmente, vence el amor. El aristocrata se siente humillado, la novia feliz, y el inepto inspector Lestrade de Scotland Yard, una vez mas, queda confuso y aturdido ante la probada eficacia del genial Sherlock Holmes. The story entails the disappearance of Hatty, Lord St. Simon's bride on the day of their marriage. She participates in the wedding, but disappears from the reception. The events of the wedding day are most perplexing to Lord St. Simon as it seemed to him that his bride, Miss Hatty Doran of San Francisco, was full of enthusiasm about their impending marriage. St. Simon tells Holmes that he noticed a change in the young lady's mood just after the wedding ceremony. She was uncharacteristically sharp with him. The only thing out of the ordinary at the church where the wedding took place was Hatty's little accident: she dropped her wedding bouquet and a gentleman in the front pew picked it up and handed it back to her."