South Korean action film. The story tells the story of In-ae (Lee Si-young) gradually erupting in order to find the whereabouts of her missing sister Eun-hye (Park Se-wan). This is an action film with a sense of revenge. In-ae, played by Lee Si-young, is a full-time bodyguard who was imprisoned for being involved in an excessive security controversy. After being released from prison, she dreams of living an ordinary life with her sister, but her sister suddenly disappears. Neither the school nor the police help, so In-ae can only look for her sister on her own.