Two kings swear to be allies and agree that the prince will marry into the other kingdom, no matter which side gives birth to a son first. Later, one of the kings gives birth to a prince, and, as agreed, the prince goes to marry the other kingdom’s princess in the company of two servants. On the way, the two servants attack the prince in a cave and put in the prince's clothes to replace him. Guided by a lama, the prince becomes shepherd of the king’s flock. The king had three princesses, and the youngest princess likes to play with the herdsmen. The poor shepherd fights with his two servants and his identity is revealed, so that he lives a happy life with the king's youngest daughter.