About the famous fortification scientist, Lieutenant General of Engineering Troops Dmitry Mikhailovich Karbyshev. Before the war, he led the work on strengthening the Brest Fortress and the approaches to Leningrad. In 1940 he was 60 years old. The beginning of the war found him in Belorussia. After one of the battles, seriously wounded, he was taken prisoner to the Mauthausen camp, where he fought against fascism for 1320 days.

One day, doctors Speransky and Nikulin made an outstanding scientific discovery: they discovered the bacillus of indifference and ignorance. To describe its action, one of them selflessly instills it in himself.

A murderer is using every possible trick in his efforts to escape from justice. He is extremely crafty in his ways of infiltrating the government. He becomes a politician with growing status and influence and an official immunity from prosecution.

A police detective is trying to find a murderer who uses a new recently developed drug for his crimes.

The end of the 1940s. Test pilot Aleksei Kolchin was commissioned for the first time to fly the first Soviet jet fighter. The tests are successful, but it is necessary to improve the aircraft. When performing a test flight, Kolchin dies, his last words are recorded on tape. Having studied them, Kolchin's friend Sergei Sharov makes a new attempt and completes the test of the aircraft.