Long ago, there was a country named Doutenpuku, where sennin called Dousen existed. Using Feng Shui arts they could make underground Enchanted Caves and with them reactivate Earth's source of life, the Dragon Vein, so the land could regain its former greenery. That was their mission. However, people in the land were puzzled by the Dousen's behavior. With all those bizarre monsters being summoned underground and such, they thought it was something evil. Bounties were placed on the Dousen's heads to drive them. As gossips spread, many people even from other countries, such as adventurers and men testing their skills, came to challenge the Enchanted Caves. You are a Dousen apprentice.