The island paradise of San Felipe has undergone a revolution! The charismatic General Siqueiros has assumed control! Those assisting him though have an agenda far beyond a simple dictatorship of a inconsequential banana republic! They’re scheming to put the entire world at their mercy through the mad scientist Karlesten’s efforts to develop a deadly missile-carried gas! And only one man can stop him! Walter Ross, Agent 3S3! And he not only has a license to kill, but also a license to spank!

A 1965 Italian adventure-Eurospy film directed by Sergio Sollima (credited as Simon Sterling). This is the first chapter in the Sollima's spy film trilogy with Agent 3S3. Here the intelligence agent from the U.S. is tasked with uncovering the leader of the Black Scorpion.

Two friends from America come together by chance in the Italian countryside. They decide to meet in Rome after both have done private deals. When one then not show up in Rome starts the other one become suspicious and fearful that something has happened to him. He begins to investigate the case himself and ends up in a spiral of industrial espionage, blackmail, and cold-blooded murder ...