A killer is cleaning up the streets of Milan by murdering those considered as deviant. An ornamental dragonfly, soaked in the blood of the victim, is left on each body.

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Main Cast: Paul Naschy, María Kosty, Erika Blanc, Ángel Aranda, Ricardo Merino, Susana Mayo, Eduardo Calvo, Mariano Vidal Molina, José Canalejas, María Vidal

Director: León Klimovsky

Writer: Paul Naschy

Editor: Antonio Ramírez de Loaysa

Cinematographer: Miguel Fernández Mila

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