This spaghetti western presents a fictitious version of the often filmed legend of Pat Garrett and Billy the Kid. Billy becomes innocently an outlaw while protecting his mother, but then turns into a trigger happy killer. When he falls in love he tries with the help of Pat Garrett, a fatherly friend, to change back. However, circumstances force Billy to become violent again and it is Garrett who is credited with the killing.
| Directing | Julio Buchs | Director |
| Writing | Lucio Fulci | Writer |
| Art | José Luis Galicia | Art Direction |
| Camera | Emanuele Di Cola | Camera Operator |
| Editing | Cecilia Gómez | Editor |
| Camera | Miguel Fernández Mila | Director of Photography |
| Production | Ricardo Sanz | Executive Producer |
| Camera | Domenico Scala | Director of Photography |
| Sound | Alberto Bartolomei | Sound Engineer |
| Costume & Make-Up | Rafael Abienzo | Costume Design |
| Camera | Santiago Zuazo | Camera Operator |
| Directing | Andrés Vich | Script Supervisor |
| Sound | Gianni Ferrio | Music |
| Editing | Magdalena Pulido | Editor |
| Art | Franco Calabrese | Set Decoration |
| Production | Silvio Battistini | Executive Producer |
| Costume & Make-Up | Humberto Cornejo | Costume Design |
| Writing | Julio Buchs | Screenplay |
| Writing | Julio Buchs | Story |
| Writing | Federico De Urrutia | Screenplay |
| Writing | Federico De Urrutia | Story |
| Writing | José Mallorquí | Story |
