Eason Chan is K.C, Chan and Y.T. Lee is Aaron Kwok, both are very smart cop, who both were assign to interpol. The only thing that make them different is woman. K.C Chan is known for courting with a lot of woman and Y.T. Lee get nervous around woman. The case for this movie is about a international thief who come to Hong Kong to steal, a diamond necklace worth over 10 million US. Anyway, Yumiko Cheng who is engage with a fertilizer mogul, soon for in love with KC Chan.

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