Shell-shocked detective Natalie Rothchild wasn't sure what stung more - knowing that her twin had paid dearly for flaunting their fortune at a Las Vegas hot spot - or prying information from the man who went AWOL after promising her forever.

In between lame excuses and darkly possessive glances, casino security expert Matt Schaffer revealed how the bejeweled tabloid queen sashayed down the red carpet before she died. Yet he couldn't say whether Natalie was dealing with a crime of passion or a family foe on a wild rampage.

Would the two ex-lovers partner up to solve this horrific crime - or would they give the sizzling heat of Sin City a run for its money?