From the frenzy before Christmas, two unmarried parents -- busy working mom Abby (Lachey) along with also her son, and frustrated attorney Ryan (Zub) along with his daughter -- accidentally mix up their toys at a busy department store. Consequently, both of the Christmases may actually get destroyed. Though both can't stand one another, the only means to have things back on the right course is to help each other salvage their holiday plans -- not understanding they are falling for one another in the procedure.