High school students investigate a mysterious homicide that occurred the prior holiday season, a couple notices their young son is acting strangely after a snowy forest trip to cut down a traditional tree and one family are stalked through a winter wonderland by Krampus, the Xmas demon. Meanwhile at the North Pole, Santa is fending off zombie elves. High school students investigate a mysterious homicide that occurred the prior holiday season, a couple notices their young son is acting strangely after a snowy forest trip to cut down a traditional tree and one family are stalked through a winter wonderland by Krampus, the Xmas demon. Meanwhile at the North Pole, Santa is fending off zombie elves. Parental Guide