An epic fantasy saga of an immortal hero’s quest to understand what it is to live...

In the beginning, an "orb" is cast unto Earth.

"It" can do two things: change into the form of the thing that stimulates "it"; and come back to life after death. "It" morphs from orb to rock, then to wolf, and finally to boy, but roams about like a newborn who knows nothing.

As a boy, "it" becomes Fushi.

Through encounters with human kindness, Fushi not only gains survival skills, but grows as a "person". But his journey is darkened by the inexplicable and destructive enemy Nokker, as well as cruel partings with the people he loves. Fushi continues his eternal quest, bearing the pain of living with the fortitude of someone who chooses his own path.

[Source: Crunchyroll]

It’s been nearly 40 years since Fushi has been seen. The pain of losing those he loved became too much to bear, so he chose a life of solitude. His absence, however, didn’t prevent his mortal foes, the Nokkers, from waging chaos. To stop any more bloodshed from occurring, he breaks his long silence to fight them once again. He doesn’t need friends to survive this, but he’ll need them to live.

[Source: Crunchyroll]

The story of Fushi the immortal enters the modern era arc.

Following the battles in Renril, Fushi, like a tree, spreads his roots throughout the world, fighting to eliminate the Nokkers.
Hundreds of years later, having completed his mission, he awakens in the modern era. He enjoys a life of peace, free of enemy threats and surrounded by precious friends, new and old.
But ominous shadows grow near yet again. Enemies that enter into the fissures of the mind. And Fushi learns of the true goals of his creator, the Beholder.

Faced with new trials, the time approaches for Fushi to make the ultimate decision.

[Source: NHK ENTERPRISES]