"Daquele Instante em Diante" documents in depth the life and artistic trajectory of the musician and poet Itamar Assumpção, who died at the age of 53. He was one of the pillars of a moment of Brazilian popular music that was conventionally called "Vanguarda Paulista". Starting from extensive research which resulted in more than 250 hours of images and a dive in the personal universe of this incredible artist, Itamar comes up through a poetic, intuitive plot where facts and testimonies speak louder than preconceived ideas.