In 1955, the African-American congressman Adam Clayton Powell Jr and trumpeter Dizzy Gillespie announced a new Cold War weapon to combat the Soviet Union - America's iconic jazz musicians and their racially integrated bands would cross the globe to counter negative propaganda about racism in America. Over the next decade, Louis Armstrong, Duke Ellington and Dave Brubeck would tour the world in service of US Cold War interests. But the unfolding Civil Rights movement back home forced them into a moral bind; how could they promote a tolerant image of America abroad when racial equality remained an unrealised dream? This documentary tells the story of how the state department unwittingly gave the Civil Rights movement a voice on the world stage when it needed one most.