The focus of the story is on Dexter, a boy genius who can't live without science. He spends his time creating fantastic inventions in his secret laboratory, which is actually his bedroom. Dexter excels in all his school subjects, except for physical education. To avoid attending the dreaded PE class once again, he creates notes for the gym teacher and hurries back to his laboratory or the library, where he, Dexter, will always be the best.