Having returned from the army, 20-year-old Sergei settles down at the thermal power station and merges into ordinary life. Every day he meets and spends time with childhood friends — the young family man Slava and the merry fellow Nikolai, and once at first sight he falls in love with a stranger on the bus. A lyrical story about a generation of young people entering adulthood, a reappraisal of values, life principles, traditions in culture and art.