The main Santa Claus was injured and will not be able to give all the children gifts and arrange a New Year's miracle. Then it was decided to send his son, the still inexperienced Santa Claus, to save the holiday. However, having moved out on a mission, young Frost loses his magic staff, and he finds himself somewhere on the outskirts of Moscow. The magical power hidden in the staff is possessed by an official who uses it for his own purposes. And Frost-son is trying to navigate the New Year's metropolis and cope with the difficult task set for him.