A hundred years ago in Japan, there was a kind of mysterious life called "worm". It was invisible and colorless, and it hardly belonged to any family or genus, but it could have a great impact on human spirit and body. The white-haired and one-eyed man Yingu (Chirang Oda) is born with a special physique. He can sense the existence of insects and use this skill to help people solve problems, so he is also known as the "insect master". Yingu trekked across mountains and rivers and traveled everywhere. He has encountered the sound-eating "Ah Mou", the girl with four horns, the real fire, the legendary dreamy rainbow "rainbow snake", and the "forbidden bug" that must be sealed by transcribing the worm's story. In this process, Yinggu is inevitably affected by insects.... This film is based on the original work of the Japanese cartoonist Tomoko Sakahara of the same name.