Concussion is a dramatic thriller based ob the incredible true David vs. Goliath story of American Immigrant Dr. Bennett Omalu (Will Smith), the brilliant forensic neuropathologist who made the first discovery of Chronic Traumatic Encephalopathy (CTE), a football-related brain trauma in a pro player and fought for the truth to be known. Omalu's emotional quest puts him at dangerous odds with one of the most powerful institutions in the world.