Everyone knows the Professor is an awfully bright man. After all, he's invented all sorts of cool devices, like the Monkey Helmet, a brilliant contraption designed to boost the intelligence of the average primate. But he forgot to take a few things into account. First, that his well-meaning assistant Jimmy might not be the most responsible person to leave in charge. And second, that the marvelous Monkey Helmets might fall into the hands of a not-so-average primate - the conniving Specter, a devilish monkey with schemes to take over the world.