In the 18th century, the aristocracy of the Korean dynasty appeared benevolent and righteous etiquette, but in fact it was decadent and desolate. Your son Zhao Yuan (BYJ) is elegant and personable, proficient in calligraphy and painting, piano and chess, and is a famous vagrant in the love field. Zhao Yuan's cousin Mrs. Zhao (Li Meishu) is virtuous on the surface, but she is full of jealousy and sadness in her heart, and has a male and female relationship with Zhao Yuan. Mrs. Zhao's husband is about to marry the girl Suyu (Li Zhaojuan) as a concubine. Mrs. Zhao secretly causes Zhao Yuan to seduce Suyu, destroying her chastity and humiliating her husband before getting started. Zhao Yuan is not interested in seducing young girls, but has his eye on Lady Shu (Quan Duyan), a chaste woman who has been widowed for nine years and has been praised by the royal family. Mrs. Zhao bet with Zhao Yuan that if he could conquer a woman like Lady Shu who abided by the way of women, she would have sex with her bed. Zhao Yuan coveted his cousin for a long time, so he tried his best to get close to Mrs. Shu, telling her her love, and the lady, who was as cold as ice to any man, gradually couldn't help herself. This film is adapted from the novel dangerous relationship written by the 18th century French novelist Laclo in the form of letters.