Ella is the humblest adopted daughter of the cook in the Potion Manor. She knows herbal medicine but can only hide it. She is slandered every day by the jealous lady of the manor, the green tea plot of the maid, and the rumors of the slanderous servant. Until Duke Samuel, who pretends to be innocent, comes to the manor to inspect the potion industry, everyone thinks he is a "soft persimmon" and wants to use him to suppress Ella. But no one knows that there is a calculation hidden in the Duke's seemingly innocent eyes. He helps Ella out of trouble by "coincidence" time and time again, and plays tricks on the jealous manor lady, green tea maid, and black-pink servant. When Ella's herbal skills are gradually revealed, the Duke's sincerity cannot be hidden under his "innocent" mask - it turns out that he is pretending to be innocent just to protect Cinderella, who he has been secretly paying attention to for a long time.
