PH
Kim Hye-In (Lee Eun-Saem) is a high school student from a poor family. She becomes the only witness of a murder case involving a female high school student. Because of this, she gets transferred to Chungdam International High School, which is a highly prestigious high school. There she meets Baek Je-Na (Yeri), who is the prime suspect in the murder case which Kim Hye-In witnessed and the most powerful student at theor school. Kim Hye-In and Baek Je-Na engage in a fierce power struggle and mental battle.