Nikolay Taube

Mirsky once left the seaside town, leaving his wife Natalia with their young daughter Svetlana. Natalia married prosecutor Kochan. And the girl, in his person, found a sensitive and responsive father. The family lived happily. When the daughter grew up, Mirsky returned to the city and, having got a job at the ballet school, where Svetlana studied, very soon achieved her respect and love, and at the subsequent trial the right word on the rights to paternity. However, very soon the birth father became convinced that he had nothing to give his daughter, and he allowed him to return to the Kochan family.

The construction of the Kremenchuk hydroelectric power plant is in full swing, but the Dnieper may flood the construction site. In order to save people, the chief engineer Ilchenko decides to blow up the newly built dam... The workers do their best not to let this prevent them from delivering the HPP on schedule.