Examines the profound claim that most; if not all; of the degenerative diseases that afflict us can be controlled; or even reversed; by rejecting our present menu of animal-based and processed foods. The idea of food as medicine is put to the test. Cameras follow "reality patients" who have chronic conditions from heart disease to diabetes. Doctors teach these patients how to adopt a whole-foods, plant-based diet as the primary approach to treat their ailments - while the challenges and triumphs of their journeys are revealed.