Two journalists, Carlos and Lola, investigate the murder of a young woman whose body appeared with her heart torn out, in what seems to be a human sacrifice. The investigation leads the reporters to a museum, whose director is the famous Doctor Gallardo.
| Actor | Role |
|---|---|
 CantinflasCantinflas | Cantinflas |
 Manuel MedelMedel | Medel |
 Carlos OrellanaDr. Gallardo | Dr. Gallardo |
 Elena D'OrgazLola Ponce | Lola Ponce |
 Tomás PerrínCarlos Manzano | Carlos Manzano |
 Max LanglerMatlatzín | Matlatzín |
| MMatilde CorellTía Mati | Tía Mati |
| EElia D'ErzellAlicia | Alicia |
| AAlfonso ParraEl comisario | El comisario |
 Manuel ArvideJefe de redacción (uncredited) | Jefe de redacción (uncredited) |
| RRaúl GuerreroBorracho de la comisaría (uncredited) | Borracho de la comisaría (uncredited) |
 Rafael IcardoEl sablista (uncredited) | El sablista (uncredited) |
| AAurora RuizCliente de adivino (uncredited) | Cliente de adivino (uncredited) |
| MMaría Luisa SerranoTurista (uncredited) | Turista (uncredited) |