It all started when a beautiful girl came to the Viscount de Moreau - an aristocrat who was engaged in investigations not at the behest of his profession, but by vocation - and, without wasting time on opening speeches, asked: “Marry me!” “Crazy?” – thought the Viscount. But no, the strange visitor turned out to be absolutely sane, and her unusual request had serious reasons. The intrigued Viscount personally took up this complicated matter, especially since it concerned his own family. Literary adaptation by O. Koltsova.