3-8 h. Irkutsk region. Landscapes of the Padunsky rapids, the Angara river. A detachment of builders at the site of the future hydroelectric power station. Meeting of young people who came to the construction of the Bratsk hydroelectric station. Meeting. Work on clearing a glade in the taiga for a high-voltage line. The work of lumberjacks. Construction of a road along the bank of the Angara. New roads in the taiga. Temporary tent camp in the taiga. Life of builders, rest. Fighting midges: spraying a poisonous mist. Construction of a new community for builders. Builders are moving into new houses. Construction of a boiler room, school. Saturday at the new school. Children go to school. Solemn meeting on the occasion of the opening of the school. The building of the new club. Playing football at the new stadium. Life of families in the village. Celebrating Builder's Day: amateur performances, fireworks, boating on the Angara River.