After she delivers her child in an ambulance, alien Eve is killed by a half-breed. Fortunately, Dr. Abbot scoops up the baby alien and escapes. In time, the baby grows into a gorgeous blonde named Sara and begins her quest to find a worthy mate. But Sara is also savage and leaves a trail of deaths in her wake. This carnage makes chemistry student Dean question whether to help her race or not.
Narumi is on bad terms with her husband Shinji when one day, Shinji goes missing. He comes back a couple of days later, but seems like a totally different person, and is now gentle and tender. He goes for a walk every day. Meanwhile, Journalist Sakurai covers the story of a family that was brutally murdered, when an unexplained phenomenon takes place. Shinji Kase tells his wife that he came to Earth to invade.
Machines have taken over, but left humans thinking that they are still the ones in charge. The androids need humans because of the human brain fluid; without it the android brains can’t work. Until the mad scientist finds out how to make this brain fluid artificially that is.