A former priest becomes embroiled in the drama raging between a Mexican rancher, his unhappy daughter and psychotic son whilst dealing with his own issues of guilt and a loss of faith. A new relationship with the local brothel keeper seems to offer a fresh start but the rancher and his son are set on making him pay for his interference and his own inner demons are never far away.
Unfortunately the movie Challenge of McKenna is not yet available on HBO Max.
| Production | José Frade | Producer |
| Editing | Juan Pisón | Editor |
| Art | Emilio Zago | Set Decoration |
| Writing | Pedro Gil Paradela | Screenplay |
| Writing | Edoardo Mulargia | Screenplay |
| Editing | Pablo G. del Amo | Editor |
| Sound | Francesco De Masi | Music |
| Art | Emilio Zago | Art Direction |
| Writing | León Klimovsky | Screenplay |
| Writing | Antonio Viader | Story |
| Directing | León Klimovsky | Director |
| Camera | Francisco Sánchez | Director of Photography |
