A face-less female ghost wearing a mini-skirt is known to roam around at night in this city. Kalin Nanase is the ghost of a celebrity who died an unnatural death. A detective named Saki Yumihara encounters the ghost of Kalin and is saved by a girl named Kotoko Iwanaga. Kotoko was kidnapped by ghosts when she was a little girl and has ever since served as a mediator between people and ghosts. Kotoko also happened to be dating Saki's ex-boyfriend Kurou Sakuragawa. Kotoko and Saki work together to solve Kalin's case.