E.C.H.O., a secret organization with a strange name masterminds a bizarre plot to take over the world by dosing important `nerve centers' with super potent LSD. The only man who can stop them is Rex, a secret agent working for an undisclosed organization.

• Bema Film
• Guy Madison
• Franca Polesello
• Mario Valgoi
• Lucio De Santis
• Adriano Micantoni
• Karin Skarreso
• Luciano Rossi
• Pier Annibale Danovi