The dramatic story captures the hard and dangerous life of the partisan group "Čapajev" led by Ľudovít Kukorelli during World War II. It retrospectively presents the course of the Slovak National Uprising in eastern Slovakia.

In a mill, far from people, lives a miller with her daughter Vojtěška. There is no man's hand here, but behind the dam of the pond lives a waterman, who does not leave the miller without help in difficult times. When the mill is most busy, unexpected help appears - a young traveler. Yesterday Vojtěška claimed that such a person had not yet been born, so that she could only look at him with her eyes. But today, under the full moon, a reed sings to her, so it is no wonder that she cannot sleep...