Death on the Blue Express

In 1923, amid the chaos of the Lincheng Outrage, a British railway investigator discovers that a serial killer is targeting passengers on the Pukou-Tianjin line—murdering those who betrayed love. As he unravels a twisted trail of fatal letters, he finds his own past entangled with the killer's bloody first love, forcing him to face the inescapable truth that destiny is forged by character and circumstance.