Andie Marks, known as "Party Girl" in her college days, is now a whip-smart lawyer on the fast track to success. Determined to move on from a bad break-up, she joins her girlfriends for a wild bachelorette weekend in Las Vegas, promising to let her hair down just this once. Vegas is a blur of cocktails and blackjack, and in the middle of it all she meets Mack, a real-life cowboy with a winning hand and an irresistible body. They get lucky...