Lucía and her son live isolated from society in a flat place where there’s practically no life. The small family unit formed by mother and son hardly ever receives visitors, and their goal is to lead a quiet existence. At first they succeed, but the appearance of a mysterious, violent creature that starts stalking their small house will put the relationship that unites them to the test.

The Three Wise Men, fed up with Santa taking more and more prominence from them, have decided to confront each other without knowing that this war will awaken a much more dangerous common enemy, the Krampus, who had been inactive for centuries.