1997 film by Wong Kar-wai

During World War II era, a young woman, Wang Jiazhi, gets swept up in a dangerous game of emotional intrigue with a powerful political figure, Mr. Yee.

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.