In 1970, Brazil was in the throes of a military dictatorship that lasted 20 years. Persecutions, arrests, killings, kidnappings. The film Seventy rejoins 18 characters of this story, forty years later. The film mixes the excitement of revisiting the past with a vision, sometimes even good humored of everything they lived. Many years afterwards they relive their experience of pain, violence and survival, of rebuilding their own story and continuing to believe in the possibility of improving the world.

The clandestine congress of the National Union of Students, held in October 1968, resulted in the collective arrest and registration of 700 students who opposed the dictatorship.

This communist and parliamentarian leader was arrested and tortured, and became famous for having written the "Minimanual of the Urban Guerrilla". Greatest name of the left-wing militancy in Brazil in the 1960s, Carlos Marighella acted in the main political events of Brazil between the 1930s and 1969 and was considered enemy number one of the Brazilian military dictatorship. His life was a great act of resistance and courage.