One day in 2002 the fifty-year old body of former Pittsburgh Steeler and hall of famer Mike Webster was laid on a cold table in front of pathologist Dr. Bennet Omalu. Webster's body looked to Omalu like the body of a much older man, and the circumstances of his behavior prior to his death were clouded in mystery. But when Omalu cut into Webster's brain, it appeared to be normal. Something didn't add up.

It was at this moment, Omalu studying slides of Webster's brain tissue under a microscope, that the world of contact sports would never be the same: the discovery of Chronic Traumatic Encephalopathy. CTE can result in an array of devastating consequences including deterioration in attention, memory loss, social instability, depression, and even suicide. And Omalu's discovery of CTE in the brain of an American football player has become the catalyst of a blazing controversy across all contact sports.

At the center of that controversy stands the unlikely Dr. Bennet...