Seeking freedom from the stifling life of the Dragon Palace, the Dragon King escapes to the surface and begins living as a humble boatman on the waters of Indangsu, enjoying the simple pleasures of a life without duties. But with the Dragon King gone, the currents of Indangsu grow dangerously wild. Fearing the raging waters, the villagers decide to calm the sea with a human sacrifice, choosing Sim Cheong as the offering. Before she is cast into the sea, Sim Cheong makes one final wish. And that wish brings her face to face with the runaway Dragon King.

She only has a father who lost his sight after the death of her mother. And she will be a sacrifice to the dragon king. But she wants to experience love before she dies.
He was instructed to deliver her as a sacrifice to the Dragon King, but… he is this Dragon King. He disguises himself as a sailor after escaping from his family, who put pressure on him to make an heir.