In this gripping Hong Kong crime thriller directed by Andrew Lau and Alan Mak, the story revolves around an undercover cop and a mole in the police force who are both trying to identify each other. The film stars Tony Leung and Andy Lau, whose performances add depth to the intense cat-and-mouse game. Known for its intricate plot and suspenseful storytelling, the movie has been critically acclaimed and won several awards, including Best Film at the Hong Kong Film Awards. Interestingly, it inspired the Hollywood remake “The Departed,” directed by Martin Scorsese. For those interested, it can be viewed for free on 123Movies / Movies123.