Luck, be a lady tonight, as the song goes. In this case, the lady's name is Lucky (Stella Stevens), a hostess in Sin City who has a penchant for stealing. But small-time jobs aren't her style, so she concocts an elaborate plan to hold up a casino and make off with hundreds of thousands of gamblers' dollars. She never expected her big finale to turn into a gunslinger's battle, however -- but that it does, tragically separating winners from losers.