A screen version of a children's book of the same name about the extraordinary journey of a little boy on the magical train Polar Express to the North Pole to Santa Claus on Christmas Eve. The boy, who did not believe in the existence of Santa Claus, suddenly gets the opportunity to go by train directly to visit him, and he, taking advantage of this opportunity, finds new friends and gets a useful lesson. Heroes are waiting for amazing adventures on the way to the goal.