It's Christmas Eve in Canterlot City, and it's one day away from Christmas. As happy as that may be, something serious has gone amiss. Rainbow Dash accidentally broke Santa's arms and knees, and now he can't walk or lift. So he appointed Rainbow Dash to give everyone gifts. Though he felt reluctant about her doing his work, but she refused to take no for an answer since she felt like a big fat jerk. So he agrees to let her put on the hat and coat to deliver presents, much to Santa's dismay since he won't find it very pleasant.
And while Rainbow Dash may find doing Santa's job to be quite a kick, what's going to be even more fun is her holiday pranks and tricks.
This story is based on the Johnny Bravo episode "Twas the Night."