This isn't your ordinary Office Christmas Party. Gone are the days of lunch-time buffets and secret Santa swaps accompanied by generic holiday carols playing innocuously in the background. In an attempt to secure a high-profile client, an office manager named Clay (T.J. Miller) comes up with the idea to host the mother of all Christmas parties. We're talking a snow slip 'n' slide, five-gallon water jugs filled with liquor, a foul-mouthed disc jockey named "DJ Calvis," staircase tobogganing, x-rated xeroxing, and, of course, Jesus riding in on a horse. And these aren't even the most out-of-hand examples. Needless to say, it's one wild ride of a holiday movie.