Shen Zhiwei was once the most favored food minister in front of the emperor, and his superb cooking skills could charm even the pickiest tongue. Overnight, she lost her sense of taste, fell from the clouds into the mire, and was relegated to the cold palace where everyone avoided. Everyone thought her life was over. Shen Zhiwei thought so too, until she dug out a food treasure record from the previous dynasty in the deserted library in the cold palace. It was not only a recipe, but also an "investigation note" guided by food. The turning point came when the Queen Mother suffered from an old headache, and the palace doctors were helpless. Shen Zhiwei relied on a lost medicinal diet in the Food Treasures to survive in danger, cure the Queen Mother in one fell swoop, and regain attention. However, blessings never come in pairs, and misfortunes never come alone. A well-planned poisoning and murder case in the harem, all the evidence points to her, a former food minister who "dedicated his crime to meritorious deeds". In order to prove her innocence, she was forced to tie up with Lu Yanzhou, the minister of the Ministry of Justice who was ordered to investigate the case. Lu Yanzhou, the famous "Iron-faced Yama" in the capital, only believed in evidence and did not believe in ghosts and gods, let alone that a cook could see the motive of murder from a plate of pastries. He looks at the traces and she identifies the ingredients. He interrogates prisoners, while she relies on theoretical knowledge and help from others. "In this almond cheese, the almonds are ground too finely, and the sweetness is sweetened with honey that shouldn't be there. It's obviously to cover up the very light bitterness." "It's nonsense. The poison has been proven long ago and has nothing to do with almonds." "Master Lu, the murder knife is sometimes hidden in the rice bowl." From a drop of oil to a hint of spice, from the cooking habits of a dish to the seating arrangement of a banquet. In countless disputes and conflicts between the two,