Nobody knows when it started. Goblins' activities grown in stature gradually until they formed an empire. King Caudwener realized this serious situation and sent his troops to the empire. However, those who were sent never returned. This empire was ruled by this one charismatic man named ‘King Gobligan’. He was the architect of the empire and he was not goblin but human. Also, he seemes to have already developed magical weapons in large scale. King Caudwener was astonished at the situations. The magical weapons themselves preexisted, but they could not be mass-produced. Only a few people could control them. Caudwener wondered how the goblins could do such things... It was only a matter of time before Caudwener declared war on Gobligan’s empire, but the empire was proven to be too powerful for them. As a result, Caudwener puts a large price on Gobligan's head. And so comes four warriors, from different walks of life, to serve Caudwener’s empire...