Her name was Maria Auxiliadora Lara Barcellos, but she was called Dora. She was 31 years old, born and raised in Brazil. On June 1, 1976, she took her own life by throwing herself in front of a subway train in West Berlin.

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 Prologue focuses on the use of political propaganda shown in the cinema and the television in the 1960's and throws light on the short films cult that were exhibited before the cinema sessions in Brazil.