A musical documentary that rummages around in the memories left by the extraordinary composer, lyricist and singer Javier Patricio "Gato" Pérez, while attending the concert of fifteen of his songs, performed by popular voices of the Spanish current musical scene. Memory (document) and legacy (works) coexist in the narration and help to understand Gato and an era: immigration, cultural and idiomatic cross-breeding, sedentary gypsies creators of the Catalan rumba, a yearning for creating around Latin music, the efforts and wear of the anonymous artist... a testimonial on the struggle and willingness to live of an entire generation.