Jacco is scientist, inventor, musician, philosopher, architect and athlete. He lives with his parents because he’s still only ten. While his mum and dad argue, Jacco shows us how much he knows about deep sea fish. He spies on the world through a periscope, and is working on an extraordinary underground hut. Is this his way of keeping reality at a safe distance? With numerous visual tricks and humorous perspectives, the makers of this moving film stand firmly behind their melancholy little hero with his fertile imagination.