It's 1974. Muhammad Ali is 32 and thought by many to be past his prime. George Foreman is ten years younger and the heavyweight champion of the world. Promoter Don King wants to make a name for himself and offers both fighters five million dollars apiece to fight one another, and when they accept, King has only to come up with the money. He finds a willing backer in Mobutu Sese Suko, the dictator of Zaire, and the "Rumble in the Jungle" is set, including a musical festival featuring some of America's top black performers, like James Brown and B.B. King.

This film is the result of more than two years of work tracking down archive material and witnesses close to Mobutu in Africa, Europe and the U.S. More than 950 hours of footage have been seen by the world. Among the 104 hours selected as the basis for this film, are 30 hours of archives recently discovered in Kinshasa and never before released. Completing these exceptional documents, are more than 50 hours of interviews with those close to the former president and the events surrounding his reign, conducted by the director in Kinshasa, Brussels, Paris and Washington. Like a vast historical puzzle, this film pieces together the tragic history of a country, and its self-styled leader - the dictator, Mobutu Sese Seko, "King of Zaïre".

How African artists have spread African culture all over the world, especially music, since the harsh years of decolonization, trying to offer a nicer portrait of this amazing continent, historically known for tragic subjects, such as slavery, famine, war and political chaos.

Universally accepted as a true icon of the 20th century, Muhammad Ali’s phenomenal achievements spanned sport, politics and religion. One man – photographer William Klein had comprehensive access to the events that shaped Ali’s legend. 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 top Clay’s camp – witnessing at first hand Cassius Clay becoming Muhammad Ali and angering the American people with his allegiance to Islam. Forward to Zaire 1974, and the return of Muhammad Ali to the world stage to face another invincible champion George Foreman. As Ali reclaimed the crown for a second time, Klein was ever present, capturing the full story at close quarter.

In Congo during the revolution, an Italian journalist is in love with the wife of a Belgian businessman.