A woman is found murdered in her house the day after a party. The police begins the search for the killer asking questions to all the people that attended the party.

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Main Cast: José Suárez, Susana Campos, Roberto Camardiel, George Rigaud, Katia Loritz, Nina Braccio, Fernando Cebrián, Helga Liné, Ángel del Pozo, Ronnie Chapman

Director: Ramón Fernández

Writers: José María Palacio, Enrique Urrutia, Ramón Fernández

Editor: José Antonio Rojo

Cinematographer: Godofredo Pacheco

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