The great hero of the Shinobi world died. As he was supposed to, his soul fell into the hands of the Shinigami.
The God of Death purified the soul and sent it back to the world of the living. Thus, a new life was born.
But the Shinigami didn't know one important thing...
It had been a long time since the hero's soul had been bound to another soul, the Nine-Tailed Demon Fox himself...