In a world blending fantasy and horror, the demon city looms, shrouded in enigma. Unsolvable mysteries plague the city, defying scientific explanation. To unravel these mysteries, three extraordinary girl detectives are summoned. Hayama Kotono, an orphan from a convent. Shirafuji Natuski, Kotono's classmate and a renowned pop idol. Hijiri Misaki, a enigmatic fighter haunted by past nightmares. As forces vie for the fate of the world, the line between justice and evil blurs. When Kotono crosses paths with an amnesiac boy, the gears of destiny begin to turn, albeit slowly. Through unraveling the city's secrets, the trio faces a fate that could reshape humanity's existence.