The river where the moon rises. Pyeungan and Ondal

Princess Pyeonggan flatly refuses to marry Go Gon and leaves the castle. She finds a shelter in a secluded mountain house of Ondal and his blind mother, Madame Sa. In the distance from the luxury of the palace, Pyeonggan learns to live again, like an ordinary girl: helps around the house, prepares and learns a lot about the world.
But no matter how much her simple life is fascinated, the princess knows for sure: he will not stop by Wonpeo until he brings all the money and power in the country. Therefore, the wise Pyeonggan comes up with a plan for the overthrow of the GO family and for several years step by step tries to bring it into execution. However, the enemy is cunning and coat, like a snake, and is not going to lose to the young princess. Who will be the winner from this confrontation?