A con artist seduces the widow of a millionaire, only to learn she'd plotted with her lover to murder the late husband. A tense game of cat-and-mouse ensues—but who's the cat?
| Writing | Luis Spota | Story |
| Writing | Roberto Gavaldón | Writer |
| Writing | José Revueltas | Writer |
| Directing | Roberto Gavaldón | Director |
| Production | Felipe Mier | Producer |
| Art | Francisco Marco Chillet | Production Design |
| Production | Ernesto Enríquez | Executive Producer |
| Editing | Charles L. Kimball | Editor |
| Production | Óscar J. Brooks | Producer |
| Directing | Ignacio Villareal | Assistant Director |
| Camera | Alex Phillips | Director of Photography |
| Sound | Raúl Lavista | Original Music Composer |
| Editing | Rodolfo Benítez | Dialogue Editor |
| Costume & Make-Up | José Jurado | Hairstylist |
| Costume & Make-Up | Concepción Zamora | Makeup Artist |
| Art | Nicolás Rueda Jr. | Title Designer |
| Crew | Jorge Benavides | Special Effects |
| Production | Jorge Cardeña | Production Manager |
| Sound | Juan Bruno Tarraza | Songs |
| Sound | Galdino R. Samperio | Sound Re-Recording Mixer |
| Sound | James L. Fields | Sound Director |
| Editing | Raul J. Casso | Assistant Editor |
| Directing | Humberto Gavaldón | Script Supervisor |
| Sound | Rodolfo Benítez | Sound |
