Time and place of action: England a little later than World War I. Huey, a former military pilot, inherited from his grandfather—a terrible bibliophile, who once traded half his estate for a rare book—an old estate and a library. With the single condition: “Take over the library.” When the young man visited the mansion to sort through the inherited belongings, he found, in the fully stocked basement, a girl calmly reading in a black dress. Her name was Dalian, and a large lock hung on her chest. She turned out to be the gate into Dantalion’s library, where forbidden ghostly books are kept—door to the demon’s wisdom.