In the vestibule of one of the train cars Moscow-Dushanbe found the corpse of the passenger. Two random travelers - police officers Denisov and Kurbanov - have to conduct their investigation in very difficult conditions...

A social drama about relationships in the family of the chairman of the Tajik collective farm, Mukhammedzhan Kurbanov: the sons Zafar and Kurban stand on different positions in life. The eldest son wants stability and silence, but the father says there will be no silence, progress does not stand still. Collective farmers in neighboring areas do not fulfill the norm due to lack of water. Young activists develop a plan to irrigate dry land with electric pumps to raise water up the mountains.