Darby Jameson knows that spending the night with groomsman Ryan Thomas after her twin brother’s wedding is a big mistake. Darby's not cut out for one-night stands and Ryan's definitely not one for relationships—she knows this. Still, she falls hard for the sexy cowboy’s many charms, and it's better than she ever imagined. Darby is in for a world of hurt when one night turns into a secret affair, but what's she to do when his smile melts her heart?

When Ryan finally gives in to his attraction to his best friend's sister, he insists it’s only temporary and best kept to themselves. Darby can do so much better than to take up with him. He has nothing to give to a sweet woman like her, and everyone knows it.

But when Darby drops a bombshell, suddenly a casual fling is no longer an option. With so much at stake, and so many factors keeping them apart, do Darby and Ryan have a chance at a happily ever after?