The documentary mixes personal interviews with Vega's relatives and friends with unreleased familiar footage and some of the live concerts where Vega sung throughout his life, including part of his artistic work.
The movie title addresses about "Persiguiendo Sombras", one of the most successful hits from Vega's band Nacha Pop, included in their 1987 album "El Momento" (The Moment).
Despite the documentary makes a revision of Vega's music albums (with Nacha Pop and in his solo carrier), it isn't mentioned "Ese Chico Triste y Solitario", a 1996 album where several Spanish singers paid tribute to him covering his songs.