Tanyou is a descendant of one of the earliest families of insect masters. He inherited a forbidden insect, so that one of his legs cannot move. Kuma, a descendant of the Medicine Bag family, did not have the ability to see insects when he was young. In order to deal with the forbidden insects, he was placed at the exit of the Thorn Road for a long time, causing his "soul" to be eaten by nuclear-eating insects. After losing his "soul", he was injected with artificial insects to replace his "soul". Every time he uses an artificial insect, he will become an empty shell and need to be re-injected with artificial insects to "revive", but he will lose his human emotions. Ginko was entrusted by Tanyou to accompany Kuma to investigate the phenomenon of insect movement in a mountain...