Woo Seul Gi (Chung Su Bin), a bright but reserved girl raised in an orphanage, transfers to the elite Chaehwa Girls’ High School. While she was the top student at her previous school, she now faces even greater competition – particularly from Yoo Je Yi (Lee Hye Ri), the school’s wealthy, high-achieving queen bee, who draws Seul Gi into a complex relationship that oscillates between friendship and rivalry. As Seul Gi tries to navigate her new cutthroat environment, she becomes entangled in a web of secrets about the school and its students, including the mysterious death of her father. Will Seul Gi and Je Yi find a way to resolve their growing tension, or will their respective ambitions lead to a bitter end? This drama was adapted from the webtoon of the same name written by Song Chae Yoon and illustrated by Shim Jae Young.