The year is 1931, the 64th year of the Meiji era; the 15th Shogun, Yoshinobu Tokugawa, continues to wield absolute power thanks to complete monopolization of a special natural resource known as Ryumyaku.

With confidential Nue files having been leaked to their enemies in Kuchinawa, a search is underway for the traitor who provided the information.

Asahi and Yukimura struggle with the nature of their relationship; the mole leaking Nue secrets may have been found.

Asahi has been kidnapped by Janome, and loyalties are called into question all throughout Nue; Yukimura tries to save her adopted sister before it's too late.

Now that her revenge is complete, Sawa doesn't know what to do with herself; Tsukishima is on the run; Elena is facing a major change.

It's become clear that Nue agents don't leave the shogun's service and live to tell the tale; it's up to Asahi to find a way for Sawa to break free of the life of violence she's become trapped in.