"I watched the victim convulse as if struck by lightning. Smoke rose from his scorched hair. Blood geysered from his carotid artery and splattered the brick wall. I ran away-I must warn everybody." * * * Charles Evans, a New York City architect, and TV reporter Dora Reeves learn that unforeseen consequences of advanced technology have forced an alien race of incorporeal beings in a parallel universe to search for a new world. The aliens discover Earth. Although lacking weapons, they devise means to infiltrate human society in order to eradicate the people of Earth, by utilizing humans' fascination with electronic gadgets. The aliens experience human sex, love, and kindness. Could these emotions change their conquering ambitions? That is what the aliens' pre-eminent physicist, Professor Patrick O'Donnell, and human anthropologist Nichole Danvers must determine as their intimate relationship develops. Charles and Dora befriend Patrick and Nichole to search for a solution. Will they be able to save the future of both races?