In 1914, began which was originated in the and extended to the . This is because Germany has occupied the of ​​ and made Qingdao a base for the invasion of . Japan (who was part of the ) is requested by Allied Powers (, and ) to joined in the war and seized the base in . However, a huge artillery batteries is placed at Fort Bismarck, and even the that the is proud of planning a operation, making it extremely difficult to capture the base. At that time, Admiral , suddenly set up a task team in the early days of the flying corps stationed at the "Oppama Navy Aeronautical Research Institute" (追浜海軍航空術研究所, "Oppama kaigun kōkū-jutsu kenkyūjo"). The unit also consists of two seaplanes, with Major Osugi as commander and a total of five pilots, including Shoji, who has never boarded an airplane before. These men would became the first task team to do such dangerous operation.