Hope for happiness in a new marriage—by creating a large, close-knit family—turned into a nightmare for Karen, her husband, and their children. At first, little Molly and her sister, Julie, nearly died, stung by bees. Both were saved by a medication invented by the entomologist, Carl Henderson. But the swarm kept growing. It seemed there was no escape from these insects: they swirled around the farm, slipped into the house, and—most importantly—began in a strange way to affect the children’s behavior…