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

Confidential File 614, The Enemy Within: Asahi and Yukimura struggle with the nature of their relationship, while the mole leaking Nue secrets is found... or is he?

Asahi has been kidnapped by Janome, and loyalties are called into question all throughout Nue. Will Yukimura be able to save her adopted sister in time? And will her employers in the Tokugawa government even let her try?