How Cassius Clay became Muhammad Ali, an emblematic figure in African American history, and one of the greatest athletes of all time.

In the segregated United States of the 1950s, Coach Joe Martin took a promising young boy under his wing: 12-year-old Cassius Clay. Clay trained hard to fulfill his dream of becoming the greatest boxer of all time. One victory followed another, and yet nothing could keep the man who had renamed himself Muhammad Ali from being scorned by whites for the color of his skin, his conversion to Islam, and his refusal to participate in the Vietnam War…