After the successful completion of the operation in Switzerland (The Torment of a Broken Heart), Aleksei Romanov finally decided to link his life with counterintelligence.
In the midst of his studies, Romanov, now an ensign, receives a new important task from General Zhukovsky and Duke Kozlovsky, the immediate boss of Aleksei.
Colonel Shakhov, who works in the Main Artillery Directorate, learns that his daughter Alina covertly takes pictures of secret documents.
Despite his paternal feelings, Shakhov nevertheless reports this fact to counterintelligence, and General Zhukovsky decides to organize the seizure of a German spy during his meeting with Alina.
Assuming that the transfer of information takes place there, Duke Kozlovsky suggests that Romanov dresses as one of the guests of the club and follows Alina Shakhova.