In 2041, World War III has eliminated two-thirds of the human population, and within the resulting social order, belief in any deity or entity beyond humanity is deemed a preposterous notion. To stop citizens from harboring potentially incriminating thoughts, the government has formed a Special Weapon Enforcement division tasked with capturing and rehabilitating such believers. The Kirihara brothers, Naoya and Naoto—who were kept hidden from society by their captors for years to conceal their psychic abilities—were promised freedom once the world was ready to accept their existence. Now, wandering through the appalling new societal climate where psychics are unwelcome, the brothers find themselves fleeing from the Enforcement's devoted operatives, Yuuya and Takuya Kuroki.