Two wrestling stars must investigate strange deaths and a secret criminal organization led by a madman who becomes invisible.

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Main Cast: 'Karloff' Lagarde, René 'Copetes' Guajardo, Gina Romand, Andrés Soler, Jesús Salinas, María Eugenia San Martín, Claudio Brook, Héctor Godoy, Consuelo Frank, Miguel Manzano

Directors: Tito Novaro, Alfredo B. Crevenna

Writers: Alfredo Ruanova, Emilio Gómez Muriel

Editor: Raul J. Casso

Cinematographer: Fernando Colín

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