In the town of WallDale, the community are greeted to a brand new arrival. The same night of the arrival, things in the town take a dark mysterious turn. The life of citizens is turned upside down as secrets of the town are unveiled.

Six estranged friends reunite over Christmas, only to accidentally awaken Black Krampus-a darker, older incarnation of the yuletide demon long erased from African folklore. As the creature stalks them one by one, punishing past sins with brutal precision, the group must unravel the legend's buried truth before their names are etched onto his eternal naughty list.