Mucki, the little teddy bear, is interested in flying and always passes a small sports airfield on his way to school. So what could be more natural than to stop and watch? But watching almost always means that Mucki is late and his teacher always has to give him a stern warning to be on time for class. So that Mucki finally realizes that as an aviator you should never be late and of course you have to be very good at math, his classmate Mitzi learns with him and accompanies him to school every day so that he is never late again. Slowly, the fulfillment of his dream comes within reach ...