After demobilization from the Red Army, the former “red devils” decide to settle in Baku. They go to work in the chemical laboratory of one of the oil industry enterprises. Here, young heroes come to grips with the fraudster Usseinov - and soon, as hostages, find themselves on the uninhabited island of Illan Dilly...
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.
Princess Shirvanskaya is from Baku. She lives in Paris and wants to get back her father’s property who before the revolution owned big oil fields.
Blinded by the desire of wealth, mother of Siko makes him leave behind his wife and child and go to America.
During the Civil War, a long time friends Ilya, Tanya and Tevdore decide to find the treasure, which is hidden by the counter revolutionists. After many precarious efforts the disguised friends manage somehow to penetrate the enemy’s camp and attend their leadership’s party. Tanya enchants the enemy Commander Kleshchuk and gets hold of the key of his apartment. The friends steal the treasure, baffle Kleshchuk’s pursuit and return the treasure to the government.
The plot of the film is taken from the legend of the Azerbaijan Maiden Tower. According to legend shirvanshah fell in love with his daughter and wanted to marry her. Learning of this daughter Shirvanshah jumped from the top of the tower in the Caspian Sea.
Adventures of three Red Army soldiers. Misha, Duniasha and Tom Jackson, an afro-American boy, are fighting against enemies.