Dear X

Yu-Mi makes a deepfake. It shows her closest friend in the theater and film department having sex with Professor Park, a well-known director who teaches at the university. She circulates it. At the same time she is sleeping with that friend's boyfriend, Geon-Woo. The friend is Ji-Yeon, the star of the department, who had just been cast in a famous director's production and had a career ahead of her. Once the video goes round, her life comes apart. Some time later she learns that the video was faked. She returns to the university, and the department's teaching assistant, Su-Ho, tells her that Yu-Mi was behind it. The two of them begin working together against Yu-Mi.