Queen Su Qingwan has the truth hidden on the tip of her tongue. Lies are bitter in the mouth, and deception by loved ones makes the bottom of your tongue numb. She used this to seize the traitor and protect the palace, but it was not a tool to fight for favor. When Emperor Xiao Jingheng's royal meal was filled with the sweetness of dying, she realized that the taste-eating demon was causing harm to the country, and the emperor wanted to conquer it himself. Sharing meals, connecting tastes, turning bitter lies into a fountain of courage. The tip of the tongue distinguishes between loyalty and betrayal, and the deep love for family and country composes a fantasy guardian legend using taste as a sword and love as a shield.