The citizens of Edo in feudal Japan are under assault by enormous insects that devour the earth. People are pleading with the government to take action. As a result, the Insect Magistrate Office is founded, with powerful warriors gathered to guard against the advent of pests. Mushibugyou is about Jinbee Tsukishima, a young man who aspires to be a skilled swordsman like his father. Jinbee wishes to fill his father's position as a member of the Insect Magistrate Office in order to atone for a tragic tragedy that occurred due to his mistake. On his way there, he encounters the charming Haru, a young lady who helps maintain her family's tea business, and is compelled to use his sword to save her from a gruesome death. This is an act.