In 2018, the fiftieth anniversary of the first workers' strike during the military dictatorship (1964 - 1985) was completed. Through the testimonies of historians, researchers and workers who participated in that historic strike in the Industrial City of Contagem, in the metropolitan region of Belo Horizonte, the documentary reconstructs this episode that lasted that same year, in July, in the famous strike in Osasco, in São Paulo. Intensifying the confrontation with the bourgeoisie in the military period and sowing the seeds of the new unionism that would emerge a decade later.