Carol (Jennifer Aniston) is the executive director of a large company. But he has a professional conflict involving his family: the department responsible for his brother Clay (T. J. Miller) does not seem very well, so unfortunately he will have to close it. To avoid his dismissal, Clay and his teammates decide to come up with an ingenious plan: to organize the best Christmas party ever. This will impress a client and avoid closing his division. Of course, none expected the party to go out of control. And is that, the holiday party goes out of hand and ends up becoming a crazy thing. Will they survive the craziest night of their lives?