The Warring States period was chaotic, with secret struggles for power. She is the princess of the Moon Kingdom, who captivates the city with her dance; he, the humble prince of the Beixu Kingdom, is as gentle as jade; two people who were not in contact with each other, but were teased by fate, fell in love with each other... They made a promise with orchid grass, and they will live up to their responsibilities in this life, and they will never forget it; under the snowy willow tree, they promise to live together in this life!