An American writer living in Rome witnesses an attempted murder that is connected to an ongoing killing spree in the city and conducts his own investigation, despite he and his girlfriend being targeted by the killer.

"All the screaming in the world won't help!"

Credits

Dario ArgentoDirector

Tony MusanteSam Dalmas

Suzy KendallJulia

Enrico Maria SalernoInspector Morosini

Eva RenziMonica Ranieri