Eighty years have passed since the invasion, and Earth is just one more minor Sorion outpost. By the time it has been mined to the Sorion king’s satisfaction, the planet will be peopled with Meldings—half-Sorion half-humans created in test tubes—and will become one more loyal planet in the Sorion kingdom. William Colton, dubbed the Angel, is considered by most humans to be their saviour and is a major thorn in the side of the Sorion government, as represented by Outpost Governor Talex, a second-generation Melding whose sole purpose is to extinguish the native population. The king has replaced previous outpost governors because they failed to catch Colton. The Angel has learned that a great weapon, the only weapon with which he might be able to defeat the Sorions, lies far underground beneath the city of Manhattan. While searching for the weapon he stumbles upon a vast complex of underground cities to which many of Earth’s scientists retreated during the early days of the invasion. There he meets Sondra Michaels, a scientist and part of the resistance movement, who will play a much more significant role in the coming tribulation than either she or William could ever imagine. She falls in love with William, and together they try to free Earth from Talex and the Sorions.