A Library team, consisting of Yomiko and American operative Drake Anderson, is sent to investigate the attack at the US Library of Congress. Upon arriving to New York City, Drake and Yomiko meet fellow agent Nancy Makuhari (a.k.a. "Miss Deep"), who also turns out to have been sent by Joker to investigate. Yomiko and Nancy are assigned to work together, and various comic moments occur throughout the series as personality clashes occur between Nancy's suave, femme fatale character and Yomiko's extreme bibliomania and her meek, childlike demeanor. During the investigation, the three Library agents foil another attempt to steal the book, this one perpetrated by a clone of Otto Lilienthal.