The U.S. military has set up a space station on the planet "Auriga". There used to be a group of aliens "cloned" by Rennes and Gediman. Among them was a woman named Ripley. Alien people who gave birth to and reincarnated into humans after the alien queen was pregnant two hundred years ago. Rehn and Geddiman used Lepalli to study alien species. A spacecraft called "Betty" was transporting a group of terrestrial people who had been anesthetized and frozen to the planet "Auriga". The kidnappers are going to hatch many eggs laid by the alien queen.
There is a young woman named Kaul on the "Betty" spacecraft. She tried to destroy the plan of hatching alien eggs. When she came to Ripley's base camp, she found that the alien had been removed. Many officers and scientific workers working on the "Auriga" were killed by aliens. Ripley has two sides. She sympathizes with and helps Kaul, together resisting the flood, and subduing the aliens who are preparing to operate the earth.
