Woo Seul Ki has grown up in a rural orphanage. She moves to Seoul and enrolls in Chaehwa High School, which accepts the top 1% of students in South Korea. Woo Seul Ki struggles to get along with other students. However, a student named Yoo Je Yi approaches her, and they become friends. Yoo Je Yi is the strongest student in the school. She has a high IQ, comes from a wealthy family, and has an impressive appearance. She has lived a life that everyone has envied since birth and is aware of her superiority. Additionally, she possesses a cunning personality that knows how to use her position to her advantage. Yoo Je Yi shows special interest in the transfer student Woo Seul Ki, and a dangerous relationship develops between them that blurs the lines between friendship and obsession.
