Festival panafricain d'Alger is a documentary by William Klein of the music and dance festival held 40 years ago in the streets and in venues all across Algiers. Klein follows the preparations, the rehearsals, the concerts… He blends images of interviews made to writers and advocates of the freedom movements with stock images, thus allowing him to touch on such matters as colonialism, neocolonialism, colonial exploitation, the struggles and battles of the revolutionary movements for Independence.

From the early 1960s to the mid-1970s, independent Algeria provided significant support to anti-colonial movements and revolutionaries worldwide. Successive presidents, Ahmed Ben Bella and then Houari Boumédiène, made Algiers a haven for activists fighting against colonial and racial oppression. Algiers the White became Algiers the Red. The internationalist Che Guevara established his base of operations there for his guerrilla activities in Africa. The African-American leader Eldridge Cleaver made it the international headquarters of the Black Panther Party. During this period, Algiers was known as "The Mecca of Revolutionaries."