Within the brilliant mind of primatologist Ethan Powell (Academy Award® winner Anthony Hopkins) lies an ominous secret -- a deep-seated mystery unsolved by his estranged family and the law enforcement officials who have tracked him down and jailed him for murders that occurred in the jungles of Rwanda. Highly educated and sophisticated, Powell's truth was derived from years of studying mountain gorillas -- to the point where he was living among them in the wild and accepted as one of their own. Now, held captive in a brutal prison for the criminally insane, Powell, who has not spoken in years, is remanded to psychiatrist Theo Caulder (Academy Award® winner Cuba Gooding Jr.), who must try to unlock the dark mystery from the mind of what appears to be a madman. What he encounters is a series of perplexing mysteries, questions with chilling answers, and shocking psychological truths. Eventually both men are led on an extraordinary journey of self-discovery.