For centuries, the Yaseki have fought the corrupted souls who seek to plunge Japan into darkness. But the fragile balance is now shifting toward the forces of evil. Ren Fudō, a young Soul Hunter blessed with the blood of the kami, receives a mission from Amaterasu Ōmikami. This simple errand is a spirit-given chance to pay off his debt to the Yaseki. But as he and his new companion, a shrine maiden possessed by a violent land kami, take to the road, Ren remembers that spirits never give for nothing. The mission turns more dangerous and crucial with every step. The future of Japan now rests on their shoulders, and an army of Yōkai stands on their path.