"Loyalty. Honor. Betrayal.". Chan Wing Yan, a young police officer, has been sent undercover as a mole in the local mafia. Lau Kin Ming, a young mafia member, infiltrates the police force. Years later, their older counterparts, Chen Wing Yan and Inspector Lau Kin Ming, respectively, race against time to expose the mole within their midst.

Movie rating: 8.0 / 10 (130655)

Directed by: Wai-keung Lau - Felix Chong - Alan Mak

Writer credits: Alan Mak - Felix Chong

Cast: Andy Lau - Tony Leung Chiu Wai - Anthony Wong Chau-Sang - Eric Tsang - Kelly Chen

AKA: Infernal Affairs 1, Mou gaan dou, I Want to Be You, Non-Stop Way, Подвiйна рокiровка, Affaires internes

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