A group of five classmates is trapped inside their school bus after a mysterious creature invade the road. Time runs and every passing minute decreases their survival chances against the constant threats of that unknown entity.

Winter 2010. Dolomites. Tommaso Conci, a 4 year old child, disappears during a festival where people disguised as devils, the Krampus, terrorize the village with whips and chains. Five years later, a child was found nameless and without documents. DNA matches: he is Tommi. Manuel, the father, can finally embrace his son. The mother, Linda, however, can not adapt to the new situation. A suspect digs inside her: what if that child is not really her son?