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.
Written by Aya
When Yan and SP Wong are waiting at the elevator, the digital floor counter skips the 4th floor. In China and Hong Kong, the number 4 is considered bad luck because it sounds similar to the word 'death'.
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Goofs
Continuity:
When Lau goes to listen to the "sampler" CD that's been dropped off for him, he presses the button on the player and we see the CD drawer close twice - first in the long-shot, and then in a close-up that starts from a fully-open position on the drawer.
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Quotes
Chan Wing Yan:
Should I salute you? Lau Kin Ming:
No, don't. How long have you been an undercover? Chan Wing Yan:
I've followed Sam for 3 years; I had several other bosses before. All together, it's been 10 years Lau Kin Ming:
10 years? I should salute you, instead. Chan Wing Yan:
I just want an identity. I want to be a normal man. Lau Kin Ming:
Getting tired? Chan Wing Yan:
You've never been a mole. You won't understand. Too bad I still can't find the stooge. I'll take him down if I've found him. Lau Kin Ming:
Don't worry. Let me give you back your identity, I'll open your file, but I don't have the password.
[...]
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