Food fanatic Stefan Gates and his intrepid Gastronuts go on another wild culinary adventure to discover the truth about how we eat, what we eat and where food comes from. Along the way, they indulge in harebrained experiments, crazy cooking and eat the world's weirdest food. The Gastronuts try to find out if we have to, ought to and should eat meat. They sample life as a battery chicken, get to the heart of a pig's innards, find out how much cow's farts cost, and share a meal with the human race's closest animal relative.