In 1944 Bulgaria switches sides and joins the war against Germany. The story focuses on the advance of the Bulgarian army through Yugoslavia and Hungary, as well as its internal struggles.

The Bulgarian intelligence service has information that the top agent Peron is to arrive in Bulgaria. The higher official of the counter intelligence Ivan with an alias Y 17 is to investigate. Peron has to meet his local contact, the former ship captain Rudnev. The young Mina is accommodated in Rudnev's home. Rudnev figures that she is counterintelligence and agrees to cooperate with the task force. Soon after, Peron meets Mina and an eccentric engineer, fired from the job. The young man is the deep undercover agent Y 117. Peron tests the man. He tells him that Mina is an agent of the Bulgarian counterintelligence, and gives him a gun to kill her. Y 117 shoots Mina but the bullet was a blank. After that Y 117 should leave the country with Peron.

The courage to preserve one's integrity in trying times.

Captain Velkov was sent chief of a border post near the village of Novi Izvor, where he was a partisan. In Novi Izvor a celebration is being prepared to mark the switching on of the electricity. Saboteurs cut the cables, killed the watchman and set fire to the machinery on the farm.

The university student Bobchev joins a youth brigade. The commander's council entrust Bobchev with a literacy course for members of the brigade. Velizarov and Monkata arrive in the camp to carry out sabotage. They place explosives on the dam, and attempt to win Bobchev over by means of intrigue. There is a storm: the camp is put on the alert. Everyone joins the rescue work at the dam. After a long struggle with Velizarov, Bobchev cuts the burning fuse of the explosive. The dam does not yield to the pressure of the flood. Everymen sing in Jubilation.

The middle-aged poor painter Tsokov doesn't believe in marriage, something completely unacceptable in a cramped socialist society.

The protagonist in this picture is legendary Bulgarian Khan Krum - a ruler in the beginning of IX century. In this period, Bulgaria ranked third in Europe in terms of territory and military power. It is Khan Krum who contributed to the union of Bulgarians and Slavs. He enforces unseen to that day laws against calumniators, thieves, violators. It stirs discontent among his closest men. The ruler is smart and just, but isn't he too severe? At what cost can one ensure order and progress in a state?

Born in a small village, Yordan has to live and work in the nearby town. Only on the weekends can he return to his native village. He travels by a bike and observes the nature and the animals around him with overt sadness. In the village arrives a young pharmacist and she rents his house. Soon both of them fall in love. In order to be near her, Yordan tries to persuade his colleagues to move one of the workshops from the plant to the village. But they are all used to living in the town now and decline his offer. Yordan realizes that he cannot demand impossible things.

The fortunes of a group of partisans after the triumph of the socialist revolution.

During Second World War a beautiful love between two young people burns out against the background of the Nazi reality.