One man - photographer William Klein - had comprehensive access to the events that shaped the legend of Muhammad Ali. In 1964, the young gregarious Cassius Clay successfully defeated the seemingly invincible Heavyweight Champion of the World Sonny Liston. The manner of Clay's victory and his amazing persona made him an instant superstar. Through this incredible period, and Clay's subsequent rematches with Liston, William Klein enjoyed unrivalled access to Clay's camp - witnessing Cassius Clay becoming Muhammad Ali, angering the American People with his allegiance to Isalm, at first hand. Forward to Zaire 1974, and the return of Muhammad Ali to the world stage. Condemned by the American Government for refusing to go to Vietnam, and by the boxing world for his defeat against Joe Frazier, Ali arrived in his spiritual homeland to face another invincible champion George Foreman. As Ali reclaimed the crown for an unprecedented third time, Klein was ever present, capturing the full story at close quarter.