In a secret laboratory, a scientist invents a powerful chemical formula capable of reverse time which will interfere with people's daily lives. E o Tempo... Atrás Voltou is a representative example of amateur filmmaking in the post-Second World War period, which mixed very artisanal special effects devices (heirs of the style popularised by Georges Méliès) with the narrative and dramatic codes of the B-series science fiction dystopias of the 1950s, heavily influenced by the trauma of the nuclear threat.