The Great Serpent Mound is concealing more than its own secrets. Mysterious extraterrestrials hidden below its curving body are mind-stripping humans and plotting the conquest of the Earth! Roland inexplicably arrives in Ohio from France bringing an extraterrestrial war with him that battles it out over Ohio skies at Serpent Mound, the ancient Native American site where enigmatic beings might have gathered unnoticed for millennia. Who knows? And who knows how many people have been mind-stripped by the Endron or how to stop and remediate this soul destroying enterprise that threatens to turn humanity into little more than beasts? Summer cannot turn away from the truth. After having come under attack by an enemy race, the Endron; after having been swept away to the fantastical planet Avian; after having spent a brief time in a Martian underground colony, she must contemplate a uncomfortable truth about her own origins. Can Summer save Roland? In this sequel to Cygnus, Neighbor Bill asks, "What's that climbing down a ladder from the sky?" Bill and his band of UFO investigators find an answer to that question. Will anyone believe them? Will anyone heed their warnings?