The corpse of old Bobo Nazir was found in a mountain village after a fire. Major Kasymov in the basement of a burned-out house discovers a chest with jewelry that belonged to the Basmach Rakhimbek. The absence of a priceless battle belt points to the cause of the crime. The detectives go to the jewelry dealers to capture the criminals.

The construction of the Vakhsh Canal, one of the largest new buildings of the first five-year plan, is underway. Two Americans are coming here under contract. A seasoned spy, Colonel Bailey, who introduced himself as the harmless traveler Mr. Murry, would later be caught red-handed and exposed. And Mr. Clark, who came to the "make money" channel, will gradually become convinced that work and politics are not such different concepts. Not accepting socialism, he quite sincerely sympathizes with the enthusiasm of the Soviet people. Love for the translator - Komsomol member Maria Polozova - helps Clark to comprehend what is happening.

Lola's father leaves according to old traditions and tries to keep the reputation of his daughter unstained while local arts club director pressures her to sing at the annual youth festival.

On the eve of 1917 in Turkestan, the son of a Tajik landowner, Kamol Abdullaev, is preparing to marry the daughter of a Russian general, Olga Poddubtseva…