In Aaron Woolf's thought-provoking documentary, friends Ian Cheney and Curt Ellis move back to America's Corn Belt to plant an acre of the nation's most-grown and most-subsidized grain in an attempt to follow their crop into the U.S. food supply. What they discover about genetically modified seeds, powerful herbicides and the realities of modern farming calls into question government subsidies, our fast-food lifestyle and the quality of our food.