In a corner of the world, there is such a creature: they are inferior and strange, different from any animals and plants, with their own life form and way of survival. They have been revered by humans since ancient times, and they are called "bugs" since I don't know when. The profession of "Mushi Master" came into being. They study insects and accept people's commissions to solve strange events caused by insects. The protagonist of the story, Ginko (voiced by Yuto Nakano) is such a wandering insect master. This time, he has to solve a kind of insect called "Eclipse". In recent days, solar eclipses have occurred in various places. During the period when the sunlight is blocked, the insects will be restless, which may cause various problems. Some people will be harmed by the insect gas, become afraid of sunlight or insomnia, and some people will even disappear. What worries Ginko the most is a tricky abnormal phenomenon caused by "Eclipse"...