The nobleman Alexei Ulanov did not know when he went to his uncle-general in St. Petersburg what fateful meeting awaited him there. A mysterious beauty who stood in the way of a young man turned his whole life upside down. Because of this stranger, because of her momentary whim, Alexey is accused of the murder of General Talyzin, he is arrested, wanders, unsuccessfully tries to justify himself and restore his good name... But the main thing is to find her, this mysterious woman who illuminated his life with light love - and at the same time caused suffering, which sometimes seems impossible to survive...