The detective agency of Yulia Zemtsova received an order to investigate the murder of a young woman, the wife of a famous and very rich businessman Nikolai Stupin. Dina was shot. No weapon found. Days passed, and there was not a single lead in this case, nothing that would allow the investigation to move forward. Agency director Igor Shubin was outraged. His friend Yevgeny Krymov, who had recently arrived from Europe, claimed that he knew the name of the killer. He even wrote it on a piece of paper and gave it to Shubin. But how could Krymov know who shot the businessman’s wife? This was impossible to know. Moreover, guess. This is a new matter... But if everything is so, then why does he, Shubin, constantly think about this note, still not daring to look into it?..