On the quiet farm of Mullewapp a great day approaches: Waldemar’s birthday is coming up. The three friends – Franz von Hahn, Johnny Mauser and Waldemar – are really looking forward to it. But danger lurks! Horst and his gang of wild boars have got wind of the birthday cake and have only one thing in mind: to destroy the peace of Mullewapp and eat the cake. Can the three friends save the day? And the cake!