Natalia is a strange amateur detective. Has a difficult case turned up?
She sits down at the piano. Plays. And the solution to the crime comes as if by itself. But now trouble is—Natalia herself. She is kidnapped and taken to a mysterious house somewhere in Europe. The kidnapper is a wealthy Frenchman, Guy Dupont—someone ready not only to provide her with luxury and comfort, but also to pay a large sum… in exchange for her help investigating a mysterious theft that happened at his party. Why wasn’t she asked to take on this case of her own free will? Why stage such a strange comedy with a kidnapping? Natalia understands: Dupont is lying to her. But what does he really want?