The collision of two worlds is always a drama. An intelligent engineer of Tsarist Russia - and a young Komsomol member with a shovel in her hands. Cold calculations of Western specialists - and the ardent enthusiasm of metro builders, smashing into smithereens all conceivable obstacles in their path... In 1935, fragments of the old bourgeoisie could still be found in Soviet underground palaces. Let me introduce: Professor Grigory Dmitrievich Dubelir, who waited for the opening of the Moscow metro like no one else.