Kara and her little brother relocate to Montana woodlands, so their mother can set up a local internet hub. But their new town has a secret. Bioluminescent, floating parasites rise every night from underground lava tubes and make a symbiotic exchange—human electricity for addictive serotonin. As free will becomes an illusion, Kara discovers how much the village loves its captors, and will stop anyone who tries to fight or escape their psychotropic cult. A terrifying novel that explores feminism and consent, religious fervor, and the dark history of American asylums—filled with kaleidoscopic wonder and cosmic terror.