About the life of the Russian biologist Ivan Michurin. 1912 year. Having rejected American offers to work abroad, Michurin continues his research in the Russian Empire, despite the fact that his ideas are not perceived by the tsarist government, the church and idealistic science. Michurin is supported by prominent scientists of the country and he continues to work hard. After the October Revolution, a small Michurin garden in the city of Kozlov (the biologist's homeland) becomes a large state nursery.

Siberia, 1916-1917. Bolshevik Pyotr Sapozhkov is engaged in revolutionary propaganda and agitation in a small Siberian town after the end of his exile. He is assisted by his wife Varya. After the February Revolution, the Bolshevik party is still outlawed, Pyotr and Varya go into hiding and face arrest. The guards manage to capture their son Timu and the boy is taken to an orphanage.

Soviet propaganda film about communists plotting a violent attack on a Russian city. A local poet helps the communists and they glorify his poem about Lenin.

Young dentist Chesnokov has a knack for painless tooth removal, much to the dismay of others, who fear unemployment and start to challenge Chesnokov.