1753. The third year of the Houreki period.
A little before the Tokugawa Shogunate was established around 1603, huge insects began to appear all over Japan. Different from the yokai and other creatures that lurked the mountains, these monsters posed a serious threat to the livelihoods of the people who lived there.
Hachina walks alone through the mountains of Tanba Province.
A traveling medicine woman who works to stem the neverending flood of insects, she pays a visit to a village…