Remember Einstein's riddle? Well, the one where the Englishman lives in a red house, they drink coffee in a green house, everyone has different pets, and you have to figure out who drinks the water and who keeps the zebra? Only 2% of the world's population can solve this riddle. But Gaspard, a very, very special detective, solved it in less than an hour. What’s so special about this, you ask? And the fact that Gaspard is not only the owner of a hypersensitive sense of smell, two jobs in Paris and many colorful notebooks where he writes down amazing facts from life and Google. The fact is that Gaspar has an extra chromosome. He has Down syndrome. A detective with Down syndrome takes on a murder investigation in a special boarding school. And the truth that he learns is more terrible and surprising than anything he has ever learned before.