Yi Jin'er is the daughter of Yi Zhiyue, an important minister in the underworld. From the time she was born, she was destined to marry into the Shang Palace and become the princess of the prince of the underworld. However, unwilling to succumb to her fate, she chose to escape across the realm and into the human world, hoping to escape the fate of being at the mercy of others. In the human world, she meets the swordsman Murong Leng. How will she choose between family mission and freedom and true love...