The attractive-looking magatama is the subordinate of His Highness Wu Xian. She was originally an ancient stone soul from ancient times. The ancient stone that contained the essence of heaven and earth nourished her soul. However, the memory of her previous life was sealed due to a catastrophe. That day, Wu Xian's pet Dahei, a stone with a diamond outer layer and an obsidian inner layer, sneaked out to play. Magatama was ordered to carry a lantern to search for his whereabouts but did not expect to find the sinister His Highness Muchen. The antique wooden door was closed tightly. What kind of adventures and stories would be revealed when it was opened? How will Muchen face his past love for Magatama? Can the promise he made in one night really be kept for the rest of his life?