The Story of the Expedition Woman

So-yeon is on a weekend date with her boyfriend, Ji-seok, and then she invites him to her house to save money on the motel. Her step brother, Sang-woo, comes home earlier than expected and sees them having sex. He records them secretly and plans to blackbail So-yeon with it.

Seol-ah is having a small party to celebrate her 100th day with her boyfriend Do-jin. As the party went on, Seol-ah suddenly fainted and collapsed. Do-jin tampered the drink with a drug. Do-jin invites his friend Dong-joon to film him sexually harassing a dejected Seol-ah with a camcorder. Seol-ah, who opened her eyes the next day, is shocked and tries to escapes the house when she sees Dong-jun lying next to her, but is forced to have sex with Do-jin, who has changed 180 degrees. Seol-ah, who later felt violated by Do-jin and Dong-jun, decides to leave for Japan.