Autumn, 1937. Against the Imperial Army's objections, Lt. Colonel Yuuki
establishes the spy training group "D-Agency." The army sends Liuetenant Sakuma to serve as their liason to D-Agency, and he watches the applicants easily coast through the brutal examination process. Not long after, Sakuma is ordered by Colonel Mutou to search the home of a suspected American spy, the Japanophile John Gordon. Disguised as military police, Sakuma leads D-Agency on their first mission.
The Imperial Army, following 
Lieutenant Colonel Yuuki's proposal,
،قام الجيش الإمبراطوري
Die Kaiserliche Armee
el Ejército Imperial aceptó la propuesta
 formulada por el teniente coronel Yuuki
el Ejército Imperial aplicó la propuesta 
formulada por el teniente coronel Yuuki
Le lieutenant-colonel Yûki
de l’armée impériale
L'Esercito Imperiale,
O Soldado Imperial Tenente Coronel Yuki teve
a iniciativa de fundar uma escola secreta