Romania, 1944. Six intelligence agents, Russians and Romanians, at the cost of their own lives, prevented the Nazis from destroying a strategically important object — a tunnel on the path of the Soviet Army.

Chronicle of the unheralded and unsuccessful invasion of the Soviet Union by the Italian army during World War II.

The very first work of a young scientist Igor Panteleyev caused a sensation. Not surprisingly, they are interested in foreign intelligence. Soviet security officers are taking measures to protect the scientist. The name of Panteleyev disappears from the pages of newspapers and magazines. The scientist is transferred to work in another research institute, changing his surname to Evdokimov. But due to chance, foreign spies found a researcher.

Four geologists are searching for diamonds in the wilderness of Siberia. After a long and tiresome journey they manage to find their luck and put the diamond mine on the map. The map must be delivered back to Moscow. But on the day of their departure a terrible forest fire wreaks havoc, and the geologists get trapped in the woods.