They are neither plants nor animals. They differ from other forms of life such as the micro-organisms and the fungi. Instead they resemble the primeval body of life and are generally known as "Mushi". Their existence and appearance are unknown to many and only a limited number of humans are aware of them. Ginko is a "Mushi-shi" who travels around to investigate and find out more about the "Mushi". In the process, he also lends a helping hand to people who face problems with supernatural occurances which may be related to the "Mushi".
Mushi-shi is just a 26 episode long anime. BUT! After watching all the episodes, you just want to go back and watch them all over again. The animation is very clean, consistent, and well done. It is about creatures, neither flora nor fauna, called mushi, who sometimes have an influence over people's lives. Many times this is a negative influence, and it is the job of the Mushi Masters to fix this. The main character is Ginko, voiced by Travis Willingham in the English. (and he does a spectacular job. in my opinion it is better than the Japanese) He travels the world alone helping people in small villages who seem to have problems with the Mushi in their area. It is a smart anime, will some heavy concepts, but none the less one of the most pleasing to watch. I recommend this anime to all!!!