Sisi and I, based on a true story, breaks Princess Sisi's sacred aura and tells the more unknown side of the moody aristocrat. The film takes the maid Irma as the first perspective, about the abusive past between her and Cissy, who has become the queen of Austria. Irma has not only been trained as a sadist, but also has unique experience in extracting cocaine from herbs. She and Cissy have been flirting with each other for many years and have constructed a harem world dominated by women. She was also the only maid who accompanied Cece when she was assassinated.