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. She cannot go to him to sort out the misunderstanding, because she has to leave with the guest. Apparently, by chance, their first stopover is in the town where Boyan works. Andrey realizes that his tour may prevent the young couple from straightening out their problem. He feigns illness, and while the lovers are engaged in expressing vows of love, he strolls across the town on his own. Finally, he finds a guidebook and learns something about the sights he was unable to visit. Ani and Boyan get married. Andrey leaves for his country pleased in spite of the bungled tour.