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.

Paul Naschyas Inspector Scaporella
María Kostyas Ingrid
Erika Blancas Silvana Scaporella
Ángel Arandaas Pietro Volpini
Ricardo Merinoas Edmundo
Susana Mayoas Claudia Volpini
Eduardo Calvoas Professor Sandro Campitelli
Mariano Vidal Molinaas Police Commissioner
José Canalejasas Ruggero
Ramón Centeneroas Vittorio Darucchi