The Moomins. Knutt Finds a Friend

Knutt is lonely. He watches others laughing and being happy, but he can't bring himself to approach them.  

One day, he finds a message in a bottle with a desperate call for help from Fitzel, who is just as lonely as he is.  

Now he must be strong and overcome his fear. Because somewhere, Fitzel is waiting, desperately needing a friend like him.