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.
Inspector Scaporella
Paul Naschy
Ingrid
María Kosty
Silvana Scaporella
Erika Blanc
Pietro Volpini
Ángel Aranda
Edmundo
Ricardo Merino
Claudia Volpini
Susana Mayo
Professor Sandro Campitelli
Eduardo Calvo
Police Commissioner
Mariano Vidal Molina
Ruggero
José Canalejas
Lucia - Prostitute victim
María Vidal
Giulia - Secretary
Ingrid Rabel
Marie - scrubwoman
Frances O'Flynn
Cop
Antonio Mayans
Ramón Centenero
Beni Deus
César Varona
Anne Marie
Juan Madrigal
Juan Cazalilla
Javier de Rivera
Rafael Albaicín
Luis Alonso
Ernesto Vañes