When an elementary school teacher's spirit wears down under pressure, Hwa-jin steps in to be her substitute — turning the tables to solve the case.
Song Si-an
Choi Ji-seon
Yoon Hyun-gil
Choi Ji-seon's mother
Jang Hee-jung
Lee Young-mi
Choi Ja-woon
Kim U-jin
Park Ji-yeon
Lee Ji-young
Kim Ye-rin
Yeon-seo
