Sammi and Andy is a couple and are thieves, which they recently sold 170 million in diamond. Suddenly, Andy Lau call for a divorce because "they can't split the money evenly". Of course that not the official reason, and you wouldn't find out why until the end. 2 years later, and we see Sammi Cheng dating a rich kid, but she's not really in it for love has she still in love with his ex-husband (andy Lau). She here because she wanted the guy family jewel, a necklace. So, she planned to stealing it, but somehow Andy Lau stole it before she did. Now we see Sammi Cheng desperately begging Andy Lau on where the necklace.

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