A chance meeting and a no-strings rendezvous in Las Vegas has chemistry flaring between Blair Haskell and Rachel Taylor. But long-distance relationships rarely work, and Blair's still kind of hung up on the woman back home who broke her heart. When Blair's friend Morgan hears about her wild night in Vegas, she doesn't let the opportunity for a wager slide. Morgan proposes a bet: which of them can get Rachel into bed again?

Blair doesn't buy in—after all, Morgan is the player, not her. But then Blair and Rachel unexpectedly meet again and share a passionate weekend affair. Blair is sure Rachel isn't interested in anything more, but as her attraction spirals out of control, she's in danger of falling.

Can a one-night stand turn into forever despite the odds? Or will the bet Blair never intended to make ruin their chances for a happily ever after?