Kim Hye-in has to transfer to Cheongdam International High School after witnessing a murder. She crosses paths with Baek Je-na, a bully who happens to be connected to the case.
Starring Lee Eun-saem, YERI, Lee Jong-hyuk, Park Si-woo, Jang Sung-yoon, Jang Se-hyuk, Heo Hyun-seo, Yoo Jung-hoo, Han Da-sol, Kim Min-kyu