New Year's Eve. Classmates stay in the house on the hillside for various reasons. Everything is happening as if someone specially gathered them here. People who have long lost their faith in fairy tales, at first perceive it as a joke. However, the appearance of an elf and Santa Claus further aggravates the situation. Gradually, they realize that they have really plunged into the world of fairy tales, and they will even have to save the celebration of the New Year, which may not come.