The divine world is composed of three kingdoms, namely the Kingdom of Heaven, the Kingdom of Earth and the Kingdom of Water. Among them, the emperor of the Kingdom of Water has the right to rule the three kingdoms. The jade seal made of three sacred stones in his hand represents his supreme status. In a blink of an eye, the emperor has been on the throne for three thousand years. One day, red water suddenly emerged in the Kingdom of Water, which means that a new emperor is about to be born. The water god Habaek (played by Nam Joo Hyuk) and the servant of God Nam Soo Ri came to the world together to find the sacred stones and three guardians of the sacred stones scattered here. In a mistake, Habaek met a surgeon named Yoon So-ya (played by Shin Se-kyung) and lost his divine power again. Yoon So-ya, who advocates science, does not believe what Habaek said at all and only regards it as nonsense. However, as time goes by, what Habaek said is confirmed one by one. In the interaction and understanding, a great love story unfolds between one god and one person.