Can Krumme and his family save Santa Claus and Christmas?

Krumme bets with the whole class whether Santa Claus exists. Up at Santa's place, the magic book is gone, and then Christmas is over. So now Krumme must both prove that Santa exists and save Christmas. But the robbers Boris and Ivan are also on the hunt for Santa's book. All in all, a fairly ordinary Christmas at Krummerne.—Nordiskfilm