Several hundred years after Yoshihiko defeated the dark spirit Deathtark in a fierce battle and saved the world, the world is once again plunged in darkness. Resurrected by the power of Buddha, Yoshihiko and his party set off on a journey around the world. Will they be able to save the world again?

This season is going to be set 100 years after Yuusha Yoshihiko to Maou no Shiro. It will star all the main characters from the first season.

The story is set in an ancient time, when the whole country was covered in thick forests. A mysterious plague breaks out, resulting in countless deaths. A pure young man named Yoshihiko becomes chosen as a hero, and he sets out on a journey in order to save a village. He has two goals - to bring back the legendary plant that can cure the plague, and to rescue his father Teruhiko who left to find the plant but never returned.