An old violin maker has been killed and the investigators have only one clue: on the night of the crime, a blind street musician heard a melody playing in the house. As they do not know the title of the song, they present the music to the famous radio contest known as "The mysterious melody". Little by little the two inspectors will surround the killer after checking that there are several suspects.
Genres:
Mick Micheyl as Lydia Martha
Dany Carrel as Luce Arnel
Manuel Gas as Comisario Luna
Howard Vernon as Inspector Revel
Carlos Otero as Florencio
Manuel Monroy as Rogelio
Bobby Deglané as Locutor Radio Madrid
Ricardo Fusté as Profesor Visconti
Ángel Moreno as Abuelo
Salvador Garrido as Sr. Adrián
Luis Induni as Jefe de policía
Ricardo Martín as Director de emisora de radio
José Palomo as Profesor de música
Raymond Gast as Comisario Luna
Manuel Bronchud as (no acreditado)
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