Song Wantang crossed into "The Most Powerful Medical Concubine" and became the white moonlight stand-in for Prince Xiao Heng. She refused to wear white clothes, refused to be a humanoid projector, and re-signed the contract with the word "add money." He used monthly money and private lessons in riding and archery to save start-up capital, bought an empty shop in Chunxi Street, and opened a private restaurant with only one table of customers. As the plot progresses, she establishes deep connections with her neighbors, and Xiao Yan, the young prince, becomes her "half-apprentice and nursing home". The reputation of the restaurant gradually spread, attracting the likes of the Imperial Master Wen Buyan, the Beidi Protagonist He Lianjin, the swordsman Gu Changyuan and others. She reached a sauce business cooperation with He Lianjin, and because of ice leaf, a mysterious spice that can extend the shelf life of meat, she was involved in a deeper power game.
