A thick, colorless fog engulfs the kingdom of Boletaria. The brave King Allant XII, renowned for his success in bringing prosperity to the city, channeled the power of souls to become the most dominant ruler in the world. But when the demons of the fog were let loose into Boletaria, the kingdom fell to ruins. Allant had awakened the Old One, an ancient beast that slept below the Nexus -- the realm between life and death. Those who lost their lives wound up in the Nexus, wandering souls now out to slay the demons and reclaim their physical bodies.