Matoi Sumeragi's only wish is to live a regular life away from the spotlight. She is content with alternating between school and her part-time work at Yuma Kusanagi's family shrine. When a Night—an malevolent extra-dimensional entity—attacks the shrine, this regular existence is irrevocably disrupted. Matoi is able to drive it away after inadvertently summoning the energies of a deity, the Nights' natural adversaries.