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 ...

In order to put an end to the numerous ambushes on the gold transports which are a real menace to the finances of the American government, the agent Joe Ford, called Dynamite Joe due to his liking for explosives, is entrusted with controlling the next transfer.

The ten gladiators are hired to travel to Arbela, a small country on the outskirts of the Roman Empire to learn if Parthia is planning to war with Rome. Upon arriving, the heroes decide to kidnap the beautiful Parthian queen and spirit her to Syria to serve as a hostage.

During an outbreak of violent murders in the area targeting young women, a journalist searching for a female friend gone missing ends up in a villa owned by an eccentric photographer.