For thirty years,

Ha Yu-seong lived as a nameless third-rate ronin—

surviving at the bottom of the martial world.

On the day he laid down his blade,

he believed his life as a warrior was finally over.

That night, everything changed.

Without warning, a power beyond his understanding awakened within him—

transforming his body, his instincts, and his fate.

The martial world that once ignored him

now stands in his path.

Retirement is no longer an option.

From a forgotten ronin to the peak of martial arts,

this is the story of a man who retired—

only to become unstoppable.