Based on the novel of the same name in the verses of Yevgeni Dolmatovsky. Together with hundreds of other boys and girls, Komsomol members Kolya Kaitanov, Slava Ufimtsev, Alyosha Akishin, Lyolya and Masha came to the construction of the first stage of the Moscow metro. They are united by the romance of the feat, the desire to always be on the most difficult and dangerous site. A romantic and heroic story about the Komsomol members of the 1930s, about the fate of the generation that endured the construction of the first stage of the Moscow Metro, the war, the post-war reconstruction of the country.