In 1937, before World War II begins in earnest. Lieutenant Colonel Yuki of the Imperial Japanese Army forms the �D Agency,� an army intelligence outfit under his command and tutelage. Army General Staff attaches Lieutenant Sakuma to observe the unit�s performance. D Agency casts a wide net to find agents beyond Japanese military personnel, and Yuki establishes D Agency�s tenets, which go against IJA doctrine: �Don�t kill, don�t get killed, don�t get captured.� With this, Yuki trains a team of operatives who conduct missions against domestic and foreign powers.