Seven years ago, Allie and Levi were two star-crossed teenagers who fell headfirst into love and ran off to exchange vows in a fit of youthful passion, only to have their dreams implode before the sun set on their wedding day. Now, as fate would have it, they find themselves trapped together for days for their friend's destination Christmas wedding in Colorado. Allie is determined to escape the memories, get through the week and never see him again.

Because of a storm they find themselves alone at the vacation house with the unresolved tension shining through like a diamond. As the snow falls outside, they strike a deal-an unorthodox "closure plan" to finally put their past to rest. Bound by the twenty-four-hour understanding that they will spend one day together and then say goodbye forever.

With the glow of holiday lights surrounding them, Levi's made it his mission to win back the one he let slip away.