In a small Tatar village during the traditional holiday of the beginning of plowing, monks appear accompanied by soldiers. Trying to convert the local population to Orthodoxy by force, the monks and soldiers meet a tough rebuff from the locals. The wife of the peasant Bulat dies, and his son Asfan is taken away in an unknown direction.
Arnold Horn, a young idealistic chemist, discovers a compound that can be used for the production of an effective deadly poisonous gas. Against his will the chemical factory starts production of the poison gas to increase the value of their shares.
