Nazario is a wanderer who makes his living playing an old guitar in the streets of Madrid. From what he gets, he lives together with Sam, an orphan of eight years, which he hosted for charity and adores. The problem is that a wealthy and childless marriage intends to take the child
| Actor | Role |
|---|---|
 Sergio MolinaSergio | Sergio |
 José Luis López VázquezNazario Valiente 'El Duque' | Nazario Valiente 'El Duque' |
 José BódaloEsopo | Esopo |
 Julia SalyIrene | Irene |
 Gracita MoralesPija | Pija |
 Florinda ChicoAna | Ana |
 Paul NaschyEnrique | Enrique |
 Yolanda FarrFraulein | Fraulein |
 David RochaEl Flaco | El Flaco |
 Manuel ZarzoComisario | Comisario |
 Alberto FernándezJuanjo | Juanjo |
 José SeguraCharlie | Charlie |
| PPep CorominasEl Punk (as Pep Coromina) | El Punk (as Pep Coromina) |
 Beatriz ElorrietaSole | Sole |
 Francisco NietoEl Rata (as Paco Nieto) | El Rata (as Paco Nieto) |
| TTony ValentoRufino | Rufino |
| EErnesto VañesMexicano 1 (as Ernesto Vañez) | Mexicano 1 (as Ernesto Vañez) |
| JJavier LozanoHombre de negocios | Hombre de negocios |
 Mauro RiveraInspector | Inspector |
 José RiesgoMexicano 2 | Mexicano 2 |
 Alejandra GrepiPija | Pija |
| MMaría MareoNot listed | Not listed |
| JJosé Luis BarcelóHombre de negocios | Hombre de negocios |