Nine volunteers begin digging a tunnel through rugged mountain terrain. The group includes three miners. The others have come from different parts of the country for different reasons. When winter comes, a blizzard makes the road impassable and the truck with supplies cannot reach them in time. With only a hundred metres to dig, the tunnel collapsed. Everybody leaves the construction site, except the communist Damjan. In town they check in at the mine and are due to start work in two days. During these two days, one by one, they are overwhelmed with shame for leaving the tunnel, and finally return to Damjan to finish their work despite all the difficulties.

The beginning of the 18th century. Bulgaria is under the Ottoman bondage. The monks of the Monastery of Hilendar on Mount Athos warn the young monk Paisiy to beware of the "pestilent chapel". On his deathbed, the abbot conjures Paisiy to search for Slavonic books. The young monk goes from one monastery to another in search of ancient books. He breaks into the "pestilent chapel" and finds there stacks of old Bulgarian books telling of the wisdom of Bulgarians kings, and of the power and civilization of the Bulgarian Empire and its past glory. His fellow-monks try to burn the books but Paisiy manages to escape. His Slav-Bulgarian History circulates in handwritten copies through the captive country and the Bulgarians becomes truly aware of their national identity.

A truck driver falls in love with the woman he nearly hit.

The film is dedicated to the uprising, which broke out in Bulgaria in September 1923. All characters, with the exception of the leaders of the uprising Georgi Dimitrov and Vasil Kolarov, are symbolic characters. The central figures, Stefan and Peter, impersonate the motive forces behind the uprising - the workers and the peasants. They are involved in worker's strikes, in the stormy events of the First World War and the Soldier's uprising in 1918. They also participate in the bloody clashes of the September uprising and suffer its defeat after they have seen too late the need for concerted action by communists and agrarians.