Reiju Ginkawa is foul-mouthed delinquent with a sharp mind. As the end of her 1st year of high school approaches, she encounters a ghost, claiming to be a famous author that was murdered over 7 years ago. The ghost also claims to have the ability to foresee crimes, which Reiju refuses to believe until the very crime the ghost predicts unfolds before her. Now enamored with a way to cure her boredom, Reiju decides to take a shot at being a detective.