Dimo Manchev (Partsalev), a 50-year-old head of family, has a conservative notion of upbringing and morality. Being familiar with his disposition, the Manchev's daughter Lili (Bratanova) married his sweetheart Plamen (Gadzhokov) in secret. The young couple cast about how to announce the marriage all the more that they are both still students studying in university. The hesitation grows when the father shows strictness even though they present their relation as some university friendship.

Stamen, a civil engineer, gets a new assignment. He has to leave the capital and his friends and go to the construction site of a huge dam. On the train he meets Katya. He thinks she is an actress....

A geologist engineer Yuliya disappears. Ablamov, an elderly engineer, organizes a rescue party to look after her in the mine galleries but they find nothing. Yuliya was last seen at a ceremony for award-wining miners. The newsreel crew was filming the event. Yuliya left in the middle of ceremony. Prodanov, a headstrong and quarrelsome engineer, had followed her. Suspicion falls on him. However, the film sequences shot at the ceremony reveal that Ablamov reacted suspiciously to Yuliya's exit. Detected as the murderer, Ablamov attempts to cross the border but is caught. Yuliya had discovered that the ore contained uranium. Ablamov had replaced the samples in order to prevent the development of the uranium ore deposit.

Gosho Kalimanski, a clerk living the big city, finds difficulties to stand the endless noise around him.

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.

A fishing boat comes back to the port. Fishermen are crestfallen, as they have caught only one very little fish. To save face, they fib they have 300 kilo of mackerel on board the boat. In their will to report a success, the port administration decides to pad out the weight. So, the very little fish is grossly exaggerated into tons of belted bonito, then into dolphin and ultimately, into a whale. Which results in celebrations, honors and awards... There, naturally, is no any whale. Instead of brilliant display of an unprecedented success, the white collars make a brilliant display of their unparalleled foolishness.

A research worker Robespier Galabov (Yakovlev) lives with his family in a small communal flat with shared kitchen and dreams about a self-contained home. Galabov meet Rangel Lelin (Gospodinov), the well-known amidst the localities as the past-master, when he realized that the new municipal apartment they apply for won't be ready in the next decade. The Past-Master promises to build the private house in a month. After starting the construction, Rangel Lelin constantly blackmail Galabov for more money through treat of "putting the hat". Finally the house was built but the inauguration become gloomy. It turns out that the chimney of the fireplace doesn't work properly. After days of luckless attempts to solve the problem the past-master's brother come into sight. Knowing the Lelin's tricks he find a hat built in the chimney.

Bash maystorat went to sea with his wife and son. The road passes by vegetable garden with watermelons and they filled the trunk of stolen fruit which subsequently discarded as police goes after them. A little later, by coincidence, they are towed by a truck carrying watermelons to Burgas. Bebov fix crumpled front, but does not change the burned furniture and bash maystorat is forced to tour around the country until he found a new one. In a series of cunning finally outwit both remain without what we have agreed.