In 1983 Owl, North Dakota, the lives of three residents – elderly Horace, who spends his afternoons reminiscing in the local coffee shop; teenage Mitch, depressed backup quarterback star player-power-horse; and newly appointed high school English teacher Julia – along with those of the town's other residents, are upended by a historic whiteout blizzard.

When his dysfunctional family clashes over the holidays, young Max (Emjay Anthony) is disillusioned and turns his back on Christmas. Little does he know, this lack of festive spirit has unleashed the wrath of Krampus: a demonic force of ancient evil intent on punishing non-believers. All hell breaks loose as beloved holiday icons take on a monstrous life of their own, laying siege to the fractured family's home and forcing them to fight for each other if they hope to survive.

Some time after the Civil War, a stagecoach hurtles through the wintry Wyoming landscape. Bounty hunter John Ruth and his fugitive captive Daisy Domergue race towards the town of Red Rock, where Ruth will bring Daisy to justice. Along the road, they encounter Major Marquis Warren (an infamous bounty hunter) and Chris Mannix (a man who claims to be Red Rock's new sheriff). Lost in a blizzard, the bunch seeks refuge at Minnie's Haberdashery. When they arrive they are greeted by unfamiliar faces: Bob, who claims to be taking care of the place while Minnie is gone; Oswaldo Mobray, the hangman of Red Rock; Joe Gage, a cow puncher; and confederate general Sanford Smithers. As the storm overtakes the mountainside, the eight travelers come to learn that they might not make it to Red Rock after all...