Its structure changes daily, and thousands die within its walls every single day.

Yet, there is one infamous inmate who has survived for 64 years: Argel Lastos.
Though officially ranked as nothing more than a Class-1, Argel has always emerged victorious — no matter who he fights, regardless of their level.

He survives through strategy, combat prowess, loyal allies, and knowledge.
To maintain his aging, frail body, Argel made a contract with Karaismán’s creators — the very ones who designed “Solitude.”

In return, they assign him a mission: to protect a “product” of great value.
This time, that “product” is a blond-haired boy…
Thus begins an intense and overwhelming tale — a dark sci-fi fantasy action story starring the universe’s strongest old man.