Taking place in the year 1937 on the eve of World War II, the story involves a mysterious spy training organization known as the “D Agency.” The organization is established by Lieutenant Colonel Yuuki from the Imperial Japanese Army. His ideals lead him to recruit people beyond military academy graduates and personnel, while training them to become skilled agents in arts of manipulation. These agents would become a specialized team to conduct operations. One such antihero agent, under the name Jirou Gamou, goes on a harrowing mission to uncover secret documents titled “Black Notes,” while battling forces from within and without his own ranks.

For years, Ollie has illicitly helped the struggling residents of her North Dakota oil boomtown access Canadian health care and medication. When the authorities catch on, she plans to abandon her crusade, only to be dragged in even deeper after a desperate plea for help from her sister.