Based on the novel of the same name by Viktor Kin. 1921, Far East. Two Komsomol members, Matveyev and Bezais, must cross the front line near Khabarovsk to give the partisans money and a coded message. In Khabarovsk, Matveyev wants to meet a girl, Liza, with whom he is in love, but a serious injury disrupts his plans...