Anna is a teacher and her husband Marek is an engineer. They both face moral dilemmas at work: Marek's boss wants him to help get rid of a renowned engineer from their company; Anna refuses to support the false accusation of her student.

Russia, 1870. A group of young anarchist revolutionaries set out to overthrow the Czarist regime through violence. Their attacks create a climate of psychosis and mutual distrust among the population, but in reality, both revolutionaries and repressors are being manipulated by a diabolical individual.