Six months after receiving a letter with news of his grandfather's death, Huey arrives at his grandfather's estate, only to discover a young girl among his grandfather's library. To his surprise, the young girl claims to be the one called Dalian, whom his grandfather had entrusted to Huey to take care of, along with the Bibliotheca Mystica de Dantalian. After becoming acquainted, Huey is invited to the Conrad estate, and Dalian insists on tagging along, saying that Conrad was the one who killed his grandfather. They arrive to find everyone to be slaughtered and the estate to be in shambles; Dalian explains that it is the work of a Phantom Book Conrad stole from the library, which had gone on a rampage due to Conrad's incapability of wielding it. As they venture through the mansion and fight off the fabrications of the Phantom Book, Dalian decides that Huey is worthy of inheriting the Bibliotheca Mystica de Dantalian and becoming her Keykeeper. Together they restore the Phantom Book to its original form and seal its powers away.