A "world of truth" you don't know exists here!
Ryūsuke and Tomomi are middle school cousins. While playing in the Anabuki River in Tokushima during summer vacation, they are swept away by a strong current. Just then, a dragon appears and saves them, guiding them to a mysterious old man.
The old man declares that the two have drowned and died, but tells them that if they can find their "purpose in life" by traveling through the spirit world, they will be able to return to the living world. Although confused, the two decide to embark on a journey through the spirit world. With the dragon leading the way, they set off on their journey.
The place they arrive at looks no different from the world they came from, but soon terrifying events begin to unfold. People, consumed by fear, kill each other. Doctors in hospitals mutilate patients. No matter how many times they die, they are reborn and killed again. Yes, this is hell.
However, their journey through the spirit world doesn't end in hell. The adventure continues into even more unknown realms.
What will the two discover in the spirit world?