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.
Lydia Martha

Luce Arnel

Comisario Luna

Inspector Revel

Florencio

Rogelio

Locutor Radio Madrid

Profesor Visconti
Abuelo
Sr. Adrián
Jefe de policía

Director de emisora de radio
Profesor de música
Comisario Luna
(no acreditado)

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