In New York City for their annual tradition of Christmas Eve debauchery, three lifelong best friends set out to find the Holy Grail of Christmas parties since their yearly reunion might be coming to an end.

When Carol Vanstone, CEO of the technology company Zenotek, expresses her intention to close the Chicago branch, run by her brother Clay, he and his co-workers organize a Christmas party in an effort to impress a potential client and save their jobs. But the party gets out of control…