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.

Directed by: Andrew Lau Wai-Keung & Alan Mak Siu-Fai
Written by: Felix Chong Man-Keung & Alan Mak Siu-Fai
Release date: 2002-12-12
Runtime: 100 minutes
Critics score:
Tagline: Loyalty. Honor. Betrayal.
Related titles:
Cast:
Tony Leung Chiu-Wai Tony Leung Chiu-Wai
Chan Wing Yan 
Andy Lau Tak-Wah Andy Lau Tak-Wah
Lau Kin-Ming 
Eric Tsang Chi-Wai Eric Tsang Chi-Wai
Hon Sam 
Anthony Wong Chau-Sang Anthony Wong Chau-Sang
Wong Chi Shing 
Kelly Chen Kelly Chen
Lee Sum Yee 
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Also known as:
  • Wu Jian Dao
  • Infernal Affairs I
  • Infernal Affairs 1
  • Infernal Affairs 1 HK
  • Infernal Affairs
  • Infernal affairs 1: Origines d'une saga
  • I Want to Be You
  • Infiltrados
  • Juego sucio
  • 무간도 1
  • インファナル・アフェア:2002
  • Infernal Affairs – Die achte Hölle