This is a film expressing the joy of trail running and four seasons of Shin-Etsu area of Japan.
The area is not a steep mountainous area, rather, there are countless trails that one can run continuously and pleasantly.

Hiroki Ishikawa, a trail runner, is one of the many who has the love for Shin-Etsu area. In the film, he runs through the beautiful nature of Japan.

Trail running is often seen as a competition or a long-distance run that requires endurance. The film, however, expresses the essence of outdoor sports in which to enjoy and to play in the nature.