Constantinople, 1883. During an outing to the Black Island Edith, the adopted daughter of the French ambassador, is saved by Kalin the Eagle. She learns that he is a Bulgarian revolutionary from the April Uprising of 1876. With her help Kalin the Eagle escapes and returns to the liberated Bulgaria, where he is drawn to the socialist movement. Edith finds out that Kalin is in fact her father, and sets out in search of him. Kalin the Eagle is notable as the first movie made by the nationalized film industry after World War II in the newly formed People's Republic of Bulgaria.

A quite line in the capital city. A little girl, Veseto, slips out of home unnoticed, attracted by the voices of children playing in the yard. when the kids get tired of playing hide-and-seek, they scatter and Veseto sets out in a long stroll across the city, full of exciting adventures. She talks to a chimney sweep, stops to look at some land surveyors at work, watches an interesting football game at the stadium, enjoys herself at the fair, extemporizes as an actress and has a trying experience on a building site. All the people in the neighborhood start looking for the lost child. In the evening, Veseto reappears. She is back to the arms of her mother, while the people in the neighborhood prove by deeds their human solidarity, their love for children and their resolve to struggle for peace, a must for children's future all over the world.

Hitar Petar escapes every hard time the life gives him by using his quick mind