Documentary that traces the history of the 20th century through the story of Rogelio García Lupo, Argentinean investigative journalist and historian co-founder of the Cuban news agency Prensa Latina along with Gabriel García Márquez, Rodolfo Walsh and Jorge Masetti, and also of the weekly of the CGT of the Argentines in 1968. In a structure of Chinese boxes we access the personal file of García Lupo while he travels for the last time at age 82, after having decided to deliver it to the National Library for consultation of future researchers.