Infernal Affairs is a thrilling crime drama that follows the story of two men, Chan Wing Yan and Lau Kin Ming, who have been sent undercover to infiltrate their respective organizations. Chan Wing Yan is a young police officer who has been sent to infiltrate the local mafia, while Lau Kin Ming is a young mafia member who has infiltrated the police force.

Years later, their older counterparts, Chen Wing Yan and Inspector Lau Kin Ming, are in a race against time to uncover the mole within their midst. As the two men battle to outwit each other, they must also grapple with their own inner demons and the consequences of their choices.

Infernal Affairs is a gripping and suspenseful film that will keep viewers on the edge of their seats. It is a thrilling exploration of the moral complexities of undercover work and the consequences of deception. The film is a must-watch for fans of crime dramas, and those who enjoy films such as The Departed, The Godfather, and The Usual Suspects will find much to appreciate in Infernal Affairs.