After three nuclear wars, Japan is no longer a safe place. Nowhere is. Humans must now coexist with their fellow mutated humans who grow more and more violent each day. They will struggle to rebuild what once was.

Howlie, a hybrid of Japanese and Hawaiian blood, is kidnapped at the age of five by child traffickers. Now his life is not his own as he is sold to Sensei Matsumoto where he will be crafted and brainwashed into the perfect assassin. One who never says no.

He is Shinobi. He lives and dies for the clan. He desires nothing else but to serve.

But once Howlie refuses to follow through with his tenth execution, he himself is put to death.To his great fortune (or misfortune) an ancient, forbidden spirit communes with his soulless corpse giving him a second chance.

But this spirit is no friend, but a deadly enemy. A liar and a deceiver that once held immense power.

With the entire Shinobi clan after Howlie's head, he must use everything he's learned over twenty years to survive.

Can Howlie tame his evil spirit guardian? Or will it tame him? Find out by joining in on Howlie's exciting journey as he experiences life for the first time... even though his heart no longer beats.