Caitlin Shetterly discovered the importance of GMOs the hard way. Shortly after she learned that her son had an alarming sensitivity to GMO corn, she was told that she had the same condition, and her family's daily existence changed forever. Modified delves deep into the heart of the matter - from the cornfields of Nebraska to the beekeeping conventions in Brussels - to shine a light on the people, the science and the corporations behind the food we serve ourselves and our families every day.