Jieum, Seoha, Doyun and Chowon have decided to team up to catch the culprit together, and while they have their suspicions, uncovering the mysteries behind an accident from twenty-three years ago is no easy task. However, when the culprit makes another move, once again harming someone close to Seoha, the truth begins to unravel... Will the four of them be able to successfully bring Juwon's killer to justice?