Ani, a charming young girl, is a driver at Sofia Airport. She sends a letter to her boyfriend Boyan, a worker at a large construction site. The letter contains a single word "yes". Boyan starts preparing for a wedding. The Soviet pilot Andrey will soon return home after several years spent working with his Bulgarian colleagues. They arrange a farewell tour of Bulgaria for him on which Ani has to drive him. Because of mistaken jealousy, Boyan tears up his sweetheart's letter.
A Bulgarian village before the First World War. The young and ambitious farmer Enyo loves the beautiful but poor Tsveta. His brother and his wife arrange their engagement. The hunchback girl Stanka, daughter of the richest man in the village, is in love with Enyo. Because of her father's lands Enyo decides to end his engagement with Tsveta and starts building up his farm.
This is a typical story from the 'cold war' era. A group of kids play on a quiet street in Sofia. From a nearby window falls a key. The helpful youngsters quickly return it to the owner, but in the haste switch the keys. The unintentional error disentangles a whole spy story. The young detectives doubt the good intentions of the man they tried to help. It turns out that the key is from a secret apartment where saboteurs are hiding. The secret network is exposed to the authorities and the kids feel like heroes.
The wealthy Yurtalana is the undisputed master of his family. His older son Stoyko marries a poor girl - Sevda. On the wedding day, Stoyko tells her a dark family secret...
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.
Ognyan lives in seclusion full of malice towards his roommates. Only Gudzho and Mara sympathize with him. Ognyan blocks the road that runs through his forest. A peasant deputation comes to negotiate with him. A fight breaks out! It ends in a drama and Ognyan thinks he has to flee...
