Bill Cosby plays Leonard Parker, a former CIA spy who is recruited by the CIA—again—to save the world from an evil vegetarian who brainwashes animals to kill people. The movie also starred Joe Don Baker and Gloria Foster.

According to the opening sequence of the movie, the title refers to the idea that this film is actually the sixth installment of a series of films featuring the adventures of Leonard Parker, as parts one through five were locked up in the interests of world security.

The film ends with Leonard infiltrating the vegetarian base, fending off the vegetarians with magic meat he received from a magician, freeing the captive animals and flooding the base using dish soap. He escapes by riding an ostrich on the roof of the building, with the ostrich flying him down.