Human consciousness, which is unique in the living world, has remained a mystery of divine origin for thousands of years. But today, recent and spectacular scientific progress (from medical imagery to quantum physics) is starting to shed light on it. I think therefore I am. But who thinks inside of us? Who are we? This film takes us on a journey beyond our brains. Like conscience, human intelligence has propelled Man to the peak of evolution, giving him the opportunity to dominate the world. And yet today, intelligence would seem to have broken down. Average IQ is dropping. Through this investigation into the nature of intelligence and multiple intelligences, we discover the reasons for this breakdown, and how we can give our intelligence another boost, thanks to scientific progress, including brain cell transplants.