The story of a poor, disintegrating family of a mother Fišerová and her three children. It is set in the 1890s - a time when the poor working classes did not yet have the right to vote or a permanent eight-hour working day.

The leader of the fast-track workers' party is appointed worker director of the unprofitable Lucie mine. The wrong decisions he makes to increase production at any cost and to fulfil an unrealistic plan lead to a catastrophe in which his son is accidentally killed. After overwhelming criticism, the failed director wants to quit, but the senior management and party authorities continue to have faith in him...