Private detective Au-Yeung (Louis Koo) makes his living off other peoples' secrets... until a travel agency boss hires him to follow his own wife. The betrayal hits. Au-Yeung abandons his missing-persons case. Hours later, she's murdered. Then the police find more bodies, all killed the same way. As detective Chen (Liu Kuan Ting) investigates, every victim connects back to Au-Yeung. Directors Li Tsz Chun Jonathan and Chou Man Yu strip detective fiction to its bones in this Malaysia-set thriller. Trapped between a serial killer and suspicious police, Au-Yeung must stop the next murder with the only tools he has—the same detective instincts he's never trusted. He's an ordinary man playing a lethal game with someone who actually knows the rules.