In a martial arts world steeped in ancient rivalries and hidden dangers, one man is trapped in an inescapable loop of existence. For him, each life is merely another cycle of regression, a "painful sensation" and an "inescapable shackle" that binds him to a destiny he desperately seeks to alter. Known only as Tanseo, he carries the burden of countless past lives, each filled with memories of triumphs, betrayals, and crushing defeats, all leading him back to the same starting point.

Now, in his latest iteration, Tanseo must navigate the treacherous landscape of the murim, a realm teeming with powerful factions like the Hwasanpa, Cheongseongpa, and the enigmatic Myriad Demon Cult. From the bustling city of Yongju to the humid, mist-shrouded forests, danger lurks in every shadow, from poison-wielding assassins to the formidable Blood Shadow Guard. As he encounters figures like the cunning Myriad Demon Cult's Spy, the stoic Outer Imperial Guard Warrior, and the mysterious Blood Shadow Pavilion Lord, Tanseo must leverage the hard-won knowledge of his previous regressions to outwit his enemies and survive the intricate web of intrigue.

But with each cycle comes new challenges and deeper misunderstandings, threatening to ensnare him further. Can Tanseo, the architect of his own endless return, finally break free from the chains of fate and forge a new path, or will the weight of ten thousand kalpas ultimately condemn him to repeat the same tragic patterns forever?