Lin Xiaoman, a modern social worker, worked overtime all night to catch up on a project, and squatted downstairs in the company late at night to roast sweet potatoes to fill her belly. Unexpectedly, the moment the sweet potatoes exploded, a strange light of fire split her into the fictional dynasty, transforming her into the most unloved daughter of the Hou family, whose father did not love her mother, and who was framed by her concubine. The original owner was cowardly and could be bullied. He was pushed off the rockery and fell unconscious. When he woke up, he was replaced by Lin Xiaoman, who was short on words and dexterous. Faced with the contempt of everyone in the Hou family and the difficulties of his concubine, Lin Xiaoman adhered to the principle of "food is the most important thing for the people" and went to the kitchen to steal ingredients in the middle of the night. He set up a small earth oven in the yard and roasted the ancient version of sweet potatoes. The fragrant sweet potatoes not only amazed the entire Marquis Mansion, but also unexpectedly attracted the cold-hearted and sinister Prince Jing, the honest and loyal bodyguards, and the poisonous-tongued imperial doctor who loved to join in the fun... From then on, Lin Xiaoman relied on roasted sweet potatoes to get out of the circle, while using modern jokes to make people laugh. Everyone was speechless, while relying on roasted sweet potatoes to unlock various adventures, tease the concubine, tease the father of the prince, and flirt with Prince Jing, turning the boring life in the ancient palace into a lively roasted sweet potato business. The whole process was filled with laughter, heartwarming and funny.