Jae-Sung (Lee Jang-Woo) is a veterinarian. He wants to marry his fiance Jung-Sun (Kim Min-Seo) and he plans to propose to her on the Hangang pleasure boat. On that day, Jung-Sun disappears and Jae-Sung receives a phone call to play a game. Because nobody believes that Jung-Sun was kidnapped, he tries to find her himself.
Struggling to support herself and teenage daughter, a widow rents out the second floor of her home to a man who claims to be a novelist working on a new book.
A model student transfers to the notorious Jungmoon High School known for its severe corporal punishment by teachers and power struggles between school gangs.
