Former diplomat Kiichiro Shirahata is suspected to have illegally gained knowledge of the Imperial Army's top-secret "Grand Strategy." Investigating in secret, Jirou Gamou makes contact with Shirahata's old friend, the British consul Ernest Graham.

Aaron Price, Far East correspondent for the British Times, investigates the true identity of Lieutenant colonel Yuuki, the man rumored to have founded D-Agency. Flipping through the Military Preparatory School's list of past enrollees, his eye is drawn to a boy who passed the entrance exam at the top of his class, but was expelled for violence. His name? Akira Arisaki.