Holly Davenport and Niall Horan have many things in common, but their love of the holidays is not one of them. Holly sleeps, eats, and breathes the holiday season, especially Christmas. Niall finds everything about the holidays unnecessary. After a disastrous first meeting, neither of them expect to see each other again. Unfortunately for them, New York City isn't that big and running into each other becomes inevitable. This is Holly's busiest time of the year. Now, on top of juggling work and family traditions, she now has to deal with a temperamental grinch. Holly quickly learns nothing is what it seems and is determined to teach Niall Horan the true meaning of Christmas. Niall Horan hates three things. 1. New York City 2. Being the CEO 3. The holidays, especially Christmas Recent changes have forced him to not only move to New York City, but also be the CEO. Just when he thinks he can burry himself in work and skip the holidays, he is forced to do the opposite. Niall quickly figures out there is a thin line between love and hate. Will Holly become Cindy Lou Who and help Niall's heart grow three sizes or will Niall ruin Christmas for all?