The film is about the Bolshevik revolt in one of the Armenian Dashnak detachments.
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...
A traitor to blame for the death of members of a Bolshevik underground organization is finally revealed.
