One night, Víctor leaves his house to go and discover Buenos Aires at night, unexplored territory for him, aiming not to go home until the sun comes up. After a few tense situations for a teenager like him, he ends up accepting a prostitute's invitation to have a drink in some dive. What happens between then and sunrise will mark Víctor's life forever. Only in the future will he be able to tie up the loose ends of that night; it will be two nights and two mornings far off in time: one, when he is thirty years old and living in a Paris that still has echoes of the recent May '68 protests, and the other when, now more than sixty years old and back in Buenos Aires, he falls in love again. The story of a sentimental education, 'La tercera mañana' is a game of mirrors, identities and confusion halfway between biography and fiction, and of decisions that postpone almost an entire experience.