A ruthless businessman and bootlegger who ruled Chicago with an iron fist, Al "Fonzo" Capone (Tom Hardy) was the most infamous and feared gangster of American lore. At the age of 47, following nearly a decade of imprisonment, dementia rots Capone's mind and his past becomes present as harrowing memories of his violent and brutal origins melt into his waking life.

The 47-year-old Al Capone, after ten years in prison, starts suffering from dementia and comes to be haunted by his violent past.