In the frenzy before Christmas, two single parents � busy working mom Abby (Lachey) and her son, and overwhelmed lawyer Ryan (Zub) and his daughter � accidentally mix up their toys at a crowded department store. As a result, both of their Christmases appear to be ruined. Although the two can�t stand each other, the only way to get things back on track is to help each other salvage their holiday plans � not realizing they�re falling for each other in the process.