The film tells about the changes that have taken place at environmentally hazardous enterprises in the city of Kirishi and Priozersk in the Leningrad Region, the construction of flood protection structures in St. Petersburg. Views of St. Petersburg, the premises of the Lennauchfilm studio, the spring landscape of Lake Ladoga, the smoking chimneys of a pulp and paper mill, a view of the Priozersk furniture factory, Shchuchiy Bay on Lake Ladoga. Production processes at a biochemical plant in Kirishi, people at a rally in Kirishi demanding to remove the plant from the city. Production of vodka "Tigoda" at the plant. View of the flooded embankment in St. Petersburg, the entrances of houses. Construction of protective structures. Transport movement in the city. People are sitting at a tram stop. Measurement of radioactivity in the city, study for the toxicity of water samples.