"A", a member of a student protest organization, becomes disenchanted by his group's inability to effect real change. Emboldened to pursue more radical methods by the older, experienced leftist organizer Despard, "A" unwittingly becomes party to a labor strike that turns violent. Ultimately held responsible by the authorities for the fracas, "A" allies himself with terrorist Leonard, who intends to avenge those jailed in the protest.
Pennsylvania, 1956. Frank Sheeran, a war veteran of Irish origin who works as a truck driver, accidentally meets mobster Russell Bufalino. Once Frank becomes his trusted man, Bufalino sends him to Chicago with the task of helping Jimmy Hoffa, a powerful union leader related to organized crime, with whom Frank will maintain a close friendship for nearly twenty years.