Brian Posehn is Nick, an alcoholic loner in Cleveland who runs the landscaping business his late father left behind. He is getting ready to attend a family Christmas party at his baby brother's house. He doesn't respect his brother, who is basically a rich woman's (Paget Brewster) trophy husband. His only real motivation for attending is that he wants to hook up with his brother's college age step-daughter. In case you didn't guess it, Nick is a bit of a creep.
The party is also attended by Nick's goofy sister (Missi Pyle) and brother-in-law (Scott Adsit), who has a podcast about the Cleveland Indians. The World Series losers (sorry, I grew up in Chicago watching the Cubs) play a pivotal role in the movie. As the story moves along in chapters, each chapter is prefaced by a segment of a story told by Nick about an infamous Indians game at which the poorly attended team offered ten cent beers. The result was chaos, and Nick's story takes a similar path.