In 1950, in a small village called Northern Station, Samuel, a young mailman and his girlfriend, Évelyne, spend hours replying to letters that children have sent to Santa Claus. While delivering the letters on Christmas Eve, Samuel dies of cold in the forest. He finds himself in the magic land of Santa Claus, where he becomes an elf in charge of answering Santa’s mail. Fifty years later, Samuel opens a letter from Satia, a young girl from Northern Station who asks Santa Claus if he will save her grandmother, who is seriously ill. With the he...