In 2019, public anger at media excess has led to censorship of television, newspapers, the internet, books, movies, and music under the 'Media Betterment Act'. To fight the armed 'Betterment Squads' that go around destroying objectionable materials, the nation's libraries have formed their own para-military 'Library Corps'. Iku Kasahara (Nana Eikura) is a new recruit to the corps, where her instructor and squad leader is Atsushi Dojo (Jun'ichi Okada). At first repelled by his by-the-book approach to leadership, she is gradually won over by his commitment to their battle for 'books' and 'the freedom to know'.