With the same coolness, and the same prudence,
These two brothers have proved themselves
the Real heroes of C.I.B.!

Brothers CHUNG SHUN (LAM, BOWIE) and CHUNG CHING (WONG HE)are both serving members of the Criminal Intelligence Bureau (C.I.B) of the Hong Kong Police Force. SHUN is responsible for technical espionage like phone-tapping and eavesdropping and the recruitment of informants while CHING is to conduct intelligence analysis and assessment. C.I.B. works closely with various units in tackling organized crime syndicates and has made a quiet yet significant contribution to the Force. Serving as Intelligence Officers is absolutely challenging and has put SHUN and CHING under great stress. Their love and family lives have also been affected in some way.

SHUN ans CHING MEI-LING (NG WING MEI, CHRISTINE) have been married for over ten years but their relationship is no longer progressing as it should. CHING has rekindled his romance with HUI SUM-YIN (SHIU MEI-KI, MAGGIE) after a string of break-ups and reconciliations. YIN is employed with the magazine for which LAI works. She puts her heart and soul into her job and never misses a chance to get the facts. LAI sees YIN, who is her subordinate, as a real threat to her own position.

The two of them, thoug not openly, are in stiff competition with each other...

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