Diário do Cárcere (Prison Diary), the result of a final year course, invites the reader to get to know the guts of the Military Dictatorship that ruled Brazil between 1964-1985. Its central aim is to express the testimony of Friar Fernando de Brito, who was imprisoned in São Paulo for four years (1969-1973). Fernando recounts his day-to-day life in prison through clandestine notes, revealing the experience of living with ordinary prisoners and resisting torture. In describing what he experienced, he invites the reader to dive into the hell of the military cellars and, at the same time, reveals the subjectivity and commitment of young prisoners, capable of transforming their own spirit, revealing this through their own writing.