In war-torn Japan, the Tokugawa Shogun, desperate to restore peace to his people, orders the assassination of the hostile warlords. A beautiful young woman is raised from birth with nine other orphans, to become an assassin. Her name is Azumi, the ultimate assassin.

Swallowtail Butterfly takes place in an alternate Japan, in a ghetto where immigrants from all over the world have come to live and make their fortune. The city is called Yentown, and it is much like Tokyo. Sixteen-year-old Ageha, a young girl whose mother has just died, is passed on from person to person until a prostitute named Glico...

In the year 2011 the greatest tectonic disaster in the history of mankind has occurred. As a result of the catastrophic earthquakes North and South America, Eurasia, Africa and Australia have sunken underwater while the Japanese islands remain untouched.