On Christmas Eve, just hours before their wedding, Rebecca Huntley is left at the altar by Ben Cole, her college sweetheart and fellow cofounder of the hugely successful dating app Dealbreakers. Rebecca is shocked, but a small part of her isn't surprised. Dealbreakers matches potential couples by the things they hate, instead of what they have in common. Lately, she and Ben seem to have less and less in common. He craves the trappings of success while Rebecca enjoys simple things.

Rebecca decides to go on their honeymoon in the charming small town of Christmas Cove on the shores of Lake Tahoe. There, she runs into an old college friend, Zach Mason, who always had a crush on her. Through a misunderstanding, Zach believes Rebecca is married to Ben, and Rebecca believes Zach is in a relationship with a sophisticated older woman, when really he is a waiter at the local inn.

People are complicated. Everyone has positive attributes as well as faults--but none are dealbreakers when you're really in love. As Christmas week unfolds, will the two learn the truth about each other and then be open for a second chance at love?