In outer space, a Martian spacecraft commanded by Princess Marcuzan and her assistant Dr. Nadir is traveling to Earth to abduct women to breed a new race, since an atomic war has annihilated Martian women. Meanwhile in NASA, Dr. Adam Steele, his assistant Karen Grant and General Bowers are in a press conference presenting the astronaut Colonel Frank Saunders, who will participate of an extended space travel on the next morning. However they do not disclose to the press that Colonel Saunders is an android developed by the scientists. The Martian spacecraft lands on San Juan, in Porto Rico and when they see Saunders's capsule on the air, they believe it is an attack and they shoot the Earth ship down. The android is damaged and wanders on the island scaring people and behaving like Frankenstein. Dr. Steele and Karen head to Porto Rico to rescue the android, while the Martians abduct young women to take them to Mars.—Claudio Carvalho, Rio de Janeiro, Brazil