A revenge plot targeting the law school quietly begins in the dead of night. Lin Wei sets out to investigate the cause of her classmate's death. Along the way, she must face a killer closing in from the shadows and unravel a decades-old cold case. Zhang Lan, a former criminal investigation instructor, offers help to make up for regrets from the past, while Chen Mo, a school history enthusiast, brings crucial clues about the old case. At the root of this tragedy is Su Qiang, a veteran school custodian, and his determination to win justice for his daughter, who died by suicide after being wrongfully accused. As the flames of revenge rage, some hold fast to justice while others are consumed by remorse. With the gavel about to fall on the rooftop, the choice between vengeance and justice puts the souls of everyone present on trial.
