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.
A number of unexplained military deaths hit Italy and are ruled to be accidental or suicides, but police inspector Giorgio Solmi suspects otherwise. When a mysterious wealthy electrician is seemingly murdered by a female escort, a sinister plot slowly begins to unravel.
After being captured during a bank robbery, a cowboy is sent to a prison located in a swamp, where he contracts malaria. He soon escapes and, with the help of a Mexican, sets out to track down his partner, who escaped from the bank robbery with all the money.
After professional stickup man Mario Corda is jailed, his young, ambitious partner -- who covets both Corda's life and his wife -- cuts loose, leaving a trail of dead bodies in his wake.
A contemporary gang of international thieves has found the multi-billion counterfeit money stash that the Nazis produced. They need to dump it all across the world at once. A lower-level dame is spotted distributing some of it, and this sets American agent Bob Dixon (Stephen Forsyth) onto the trail.
