When Jesper distinguishes himself as the Postal Academy's worst student, he is sent to Smeerensburg, a small village located on an icy island above the Arctic Circle, where grumpy inhabitants barely exchange words, let alone letters. Jesper is about to give up and abandon his duty as a postman when he meets local teacher Alva and Klaus, a mysterious carpenter who lives alone in a cabin full of handmade toys.

The small town of Pinchcliffe is experiencing a great lack of snow, which is why the inventor Reodor Felgen is asked to create a snow machine. However, things do not go as planned.