A film about the Bolshevik revolutionary S. A. Ter-Petrosyan, known as Kamo (1882-1922). 1905. Detectives and gendarmes are searching for Kamo on a courier train. None of them suspect that behind the mask of a dapper prince playing cards with a gendarmerie colonel lies a brave revolutionary. In a first-class compartment, Kamo is carrying dynamite for the rebellious workers. In Tiflis, portraits of Kamo are plastered on the walls of houses. A large reward is promised for his capture. However, nothing can stop the daredevil. Under the leadership of the Russian Bolshevik Vasily, he organizes a workers' militia and, together with it, performs a series of feats.