A rich and famous painter dies leaving a secret that kept him apart from the woman he loved. Suspecting a family plot, she will try to unveil it keeping his death from the greedy relatives who are called in the middle of the night. She will try to find the truth before the dawn comes at last.
| Directing | Antonio Román | Director |
| Writing | Antonio Buero Vallejo | Writer |
| Writing | Luis Marquina | Writer |
| Writing | Antonio Román | Writer |
| Production | Luis Marquina | Producer |
| Sound | Cristóbal Halfter | Music |
| Camera | José F. Aguayo | Director of Photography |
| Editing | Antonio Ramírez de Loaysa | Editor |
| Art | Enrique Alarcón | Production Design |
| Art | Enrique Alarcón | Set Decoration |
| Costume & Make-Up | Dolores Clavel | Assistant Makeup Artist |
| Costume & Make-Up | Carmen Martín | Makeup Artist |
| Directing | Augusto Fenollar | Assistant Director |
| Art | Francisco Rodríguez Asensio | Construction Coordinator |
| Sound | Antonio Alonso | Sound Engineer |
| Camera | Simón López | Still Photographer |
| Camera | Ricardo Navarrete | Camera Operator |
| Costume & Make-Up | Pedro Rodríguez | Costume Designer |
| Editing | Teresa Bort | Assistant Editor |
| Directing | Ramón Fernández | Script Supervisor |
| Production | Miguel Pérez Marián | Production Assistant |