Twelve-year-old Ada lives with her mother in a tiny town on the picturesque banks of the Oka. Life unobtrusively but clearly teaches her its lessons, and the girl learns to understand and forgive.
The legitimate heir to the throne in exile and the son of a murdered rebel — what do they have in common? Everyone has their own goal: one dreams of taking the throne and restoring his family to its former glory, the other - to take revenge on the murderer of his father, who serves the usurpers. Young men enter into a large-scale struggle for power and honor, in which those who seemed to be friends can betray, and former enemies can turn into allies. In order to achieve the goal, both the prince and the rebel's son will have to risk the most valuable and make the main choice in their lives — to go the preordained way or to oppose fate itself.