Eight people at a remote Scottish inn find themselves confronted by a woman from Mars, who has landed her flying saucer for repairs but intends to soon conquer the Earth…

When nuclear scientists are kidnapped and smuggled behind the Iron Curtain, an FBI man and a British agent are assigned to catch the kidnappers.

After fierce Roman commander Marcus Vinicius becomes infatuated with beautiful Christian hostage Lygia, he begins to question the tyrannical leadership of the despotic emperor Nero.