Once Upon a Time : Michel Legrand is a captivating portrait of the famous jazz musician and film composer (2 Palmes d’Or, winner of 3 Oscars, 1 Golden Globe, 1 Bafta, 5 Grammys) nominated for dozens of other compositions, precursor of the newwave, orchestrator of genius... Using exclusive personal archives captured in super 8 format, the film takes us through the last two years of his life, revealing public moments during major events in cities like Paris, Moscow, Lodz, and others. It also shows intimate moments with his collaborators, friends, and his wife, as well as solitary moments dedicated to his writing. From Cannes to his funeral in Marigny, discover how this musical genius reinvented himself throughout the 20th century, leaving behind an unforgettable artistic legacy.