Roberto, a zookeeper, is not what is called an ordinary man. As a child, worked in a circus with his parents , which resulted in a strange combination of strengths and weaknesses. For instance, after having been their partner in a dangerous flying trapeze act, he has developed the ability to climb the front of a building. On the other hand, he cannot read and write. One day at the zoo, he meets Timmy, a young boy who seems to be fascinated by Lucy, a female chimpanzee. But no sooner do they start talking than a blonde tornado comes running and drags the child away.