Engineer McLean, the prince's wife Shirvanskaya and his lover Rumanescu, who came to the Soviet Union, pretend to be circus actors and act to the detriment of the country. Arranged as a worker in the oil industry, Rumanescu steals blueprints of a military invention from the chemist Petrov. Tom Jackson discovers that the circus performer and the saboteur John are one and the same person. Saboteurs, who will be chased by "red devils" and militia workers. They will try to escape abroad, but they will die in an avalanche near the Turkish border.

At a military demonstration Red Imps: Misha, Duniasha and Tom Jackson bring a captured enemy, dangerous Makhno.

In 1907, the Russian authorities learn that a revolutionary known as 'Granddad' is living in hiding with his brother. The revolutionary is soon arrested and sent to Siberia. After ten years of struggling to survive in harsh conditions, he is finally released when the Tsarist government is overthrown in February 1917. He is welcomed home as a hero, but he soon finds that even his own son has different views than he does about the future of Russia.

The legend of the Suram Fortress.