Once the most feared bootlegger in Chicago, mobster Al Capone is brought down when he is convicted of tax evasion. At the age of 40, following nearly a decade of imprisonment, he is released after the government deems him to no longer be a threat as his mind is slowly rotting from untreated neurosyphilis. Retired and living with his family in Palm Island, Florida, Capone remains under surveillance by FBI agents, as they think he may be faking his insanity. Forced to sell many of his remaining belongings to pay old debts and support himself, Capone begins to have hallucinations and loses control of his motor functions and explosive bowel movements as his disease progresses. He acknowledges that he hid $10 million before he was convicted, although he cannot remember where it is. After Capone, whose memory is nearly gone, has a physical confrontation with his wife Mae, she instructs her husband's bodyguards to keep everyone away from him. Meanwhile, Capone has increasingly debilitating visions of the men he killed and many of the violent acts he committed. His mental capacity continues to deteriorate, until a psychiatrist hired to evaluate him declares that his IQ is no more than that of a child. Wracked with guilt, and having alienated all around him, Capone eventually dies of complications from his syphilis in January 1947 at the age of 48. His surviving family changes their name from Capone, and the money he allegedly hid away has never been recovered.