Documentary about the strikes that took place in São Bernardo do Campo, in the State of São Paulo, Brazil, circa 1979/1980. That moment was of utmost importance, since it revealed a Union leader, Luís Inácio "Lula" da Silva, who would later become President of Brazil. It was also the moment when PT, the Workers' Party, became a relevant political force in Brazil.

A woman's child is kidnapped and killed after paying the ransom. 15 years later, a mysterious figure is seen visiting the site of killing and another kidnapping occurs using the same methods. The woman teams up with a detective to catch the killer once and for all.