Hannes Strohkopp has no self-confidence at all. That's why he writes to his uncle Jonas. He is a trapper overseas and sends him a strong, invisible Indian, Ibi Upu, with the help of a magic powder. From now on, he accompanies him everywhere to protect him. Hannes gains self-confidence, no one likes to tease him anymore, and soon he is also one of the best at school. So Ibi Upu can soon return to his home. After all, Hannes can now do everything on his own.