Their planet Voldur is in its death throes and evacuees are transported to Earth, aiming for Australia, Canada and the U.S. countries where there are pale-skinned humans. Dark-skinned evacuees aim for Africa and India.Charlotte and Mia are the only survivors aboard their spacecraft that without a crew is controlled by artificial intelligence, which drops them off the coast of Mexico instead of the U.S.The year is 2019 when caravans of asylum seekers from South America crowded the Mexico/U.S. border. Charlotte and Mia have been taught only English and must reach California by crossing the Rio Grande and enduring a brutal trek across the desert.Charlotte is immediately entranced by Earth and humans. Mia's brain has been connected to artificial intelligence and her goal is to eliminate humans because they are destroying Earth in the same way the Voldurans' home planet was rendered uninhabitable.Charlotte is attracted to two men, a human and a man of her own species. Both are in the medical profession but humanity's knowledge is primitive compared to that of the aliens. Mia schemes to force Charlotte to fulfill their evacuation pledge to reproduce their own kind and recreate their lost civilization.Scant months after their arrival the COVID-19 coronavirus pandemic changes all life on Earth.