Mythical fantasy/horror clad in science fiction. In a weird post-apocalyptic world, portions of science survive: such as the Human Engineering Laboratory (HEL) where autistic children tap into patients' brains to cure their nightmares. Outside, an abandoned city is grown over with carnivorous trees and run over by bands of feral cannibalistic mutants (children caught under viral rain) and gene-engineered human-animal hybrids. Amoung them, vestiges of civilization are tended by Houses of Botanists, Zoologists, Natural Historians and courtesans. The story follows Wendy, an autistic girl who somehow wakes up and harbors a demonic god, the Hanged Boy, a lord of beauty and death, and Raphael, a courtesan in the city.