A reporter and a blind, retired journalist try to solve a series of murders. The crimes are connected to experiments by a pharmaceutical company in secret research. The two end up becoming targets of the killer.

• Labrador Films
• Seda Spettacoli
• James Franciscus
• Karl Malden
• Catherine Spaak
• Pier Paolo Capponi
• Horst Frank
• Rada Rassimov
• Aldo Reggiani
• Carlo Alighiero