Developed from the French novel "Dangerous Liaisons" by Pierre Choderlos de Laclos, "Untold scandal" tells a tale about a talented playboy Cho Won (Bae Young-jun) trying to seduce Madam Suk (Jeon Do-youn) who has been defending her chastity for 9 years. But after all, all he tries to do is instigated by his first love – his aunt Madam Jo (Lee Mi-sook).

This big-selling film has also set a number of new records in Korean film industry, including best weekend box office, most online pre-order and most theater pre-order. Despite its compelling sexual tale, director Lee Jae-young also makes an effort to detail the relationship of the characters, making the movie well-balanced with sexual spice and dramatic elements.