Modern top perfumer Lin Yan crosses over to become a menial servant in the Prince Jing's Mansion. After being framed, he uses his fragrance and medicine skills to risk his life saving the dowager consort, earning Prince Jing's heavy trust. With unique fragrance formulas, he repeatedly breaks through crises, gets entangled in mansion disputes and rebellion storms, helps Prince Jing resolve sieges and escape the capital, and finally opens a fragrance and medicine shop in Jiangnan, guarding a stable remaining life with his skills.