It's Christmas again. Accompanied by cheerful and warm Christmas songs, people rush into supermarkets to buy Christmas prey, and they don't hesitate to fight and lose their manners. After a round of scuffles, Tom (Adam Scott) and Sarah (Toni Collette) carried large and small bags and went through hardships. Finally, they returned home with their troubled children Beth (Stefania LaVie Owen) and Max (Emjay Anthony). At dinner time, relatives with different personalities arrived on time, making the family lively while also causing a lot of trouble to the owners. Little Max had just had a fight with someone because other children said that Santa Claus was fictitious, and the provocative statement of the children of relatives at the dinner table made him even more angry. That night, a strange ice storm hit, and a mysterious monster suddenly descended on the earth, as if to severely punish the stupid humans who did not believe in the existence of Santa Claus... This film is adapted from German folklore.