The plot concerns Mark Adams, an FBI agent undercover within a crime syndicate in Las Vegas who is sent to broker a deal for counterfeit $20 bills with Nazi war criminal Count von Delberg, who needs the syndicate to circulate the fake money to fund the Nazi Party's return to glory in Germany. Adams is aided by an Israeli agent who is also undercover, but they must face who the Count has recruited as enforcers: A vicious Swastika-clad motorcycle gang, the Bloody Devils.
The film is known for its complicated production history: It began shooting in 1967 as a spy thriller under the working title Operation M, but the film couldn't be sold to a proper distributor. Then new footage featuring bikers was filmed and incorporated into the plot, and the result was released in 1970.
This film provides examples of:
- All Bikers Are Hells Angels: The Bloody Devils have the Hells Angels look down to a T.
- Badass Biker: The Bloody Devils are clearly no ones to be trifled with.
- The Cameo:
- John Carradine appears as a pet shop owner in one scene. Twins Alyce and Rhae Andrece, best known for their appearance on the Star Trek: The Original Series episode "I, Mudd", appear as clients of the pet shop.
- In a cameo that could be in the running for most bizarre film cameo ever, Colonel Sanders of Kentucky Fried Chicken fame appears inside one of his restaurants when the protagonists are dining there. He walks onscreen, stands there for a bit, and then asks "Isn't that the most wonderful chicken you ever ate?" Even the protagonists seems surprised at his appearance! This was because KFC paid for product placement and also fed the cast and crew of the film.
- Cool Bike: The Bloody Devils' bikes are really good-looking.
- Cool vs. Awesome: Secret agents vs. Nazi outlaw bikers.
- Nazi Nobleman: Count von Delberg is a Nazi war criminal.
- Product Placement: Adams takes his date to a KFC dinner, complete with Colonel Sanders himself making an appearance.
- Rated M for Manly: It's a movie about a James Bond-like secret agent (complete with gorgeous women who costantly surround him) facing off against a gang of outlaw bikers.note
- Rule of Cool: The reason why this film that was originally solely a spy thriller got new footage featuring bikers added to it.