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.

An American adventurer who has a gambling den in Istanbul, who is suspected to be involved in the kidnapping of a nuclear scientist, but ultimately becomes self on the search for the disappeared and gets a striving for world domination secret organization.