"Trombón" is not a classic documentary, as "Trombonanza" is not a classic experience. It is the fantastic result of living 144 hours with wonderful musicians who travel from all over the world, without charging a penny, to share an unrepeatable encounter. Young people, adults and children cross the continent with nothing more than the instrument in the case and a thirst for knowledge in their hearts. From Hancock and Coltrane to Holst and Mussorgsky, "Trombón" is an explosion of images, moving stories, secret tributes and immense celebrations.