When workaholic best man Carter arrives in Mistletoe Falls for his best friends’ Christmas wedding, a town-wide Santa Festival and a misplaced motel reservation leave him with one option—beg the woman he once rejected for a room at her bed-and-breakfast. Unfortunately, that woman also happens to be the bride’s sister…and the maid of honor.

To make matters worse, the bride and groom are delayed, turning Ashley and Carter into last-minute wedding planners, forced into a truce neither of them wants. But late-night checklists, a blizzard of holiday activities, and a charming small town turn their snark into sparks.

When they get snowed in and every near-kiss feels dangerously close to something real, Carter realizes there’s more to December than year-end deadlines.

As their truce melts, one question remains—is this a holiday fling, or the start of forever?