Seo Eun-hyun was an ordinary office worker who, alongside his entire team, was suddenly transmigrated into a brutal, high-stakes Xianxia cultivation realm. While his colleagues are blessed with miraculous spiritual roots, divine physiques, and rapid growth potential, Eun-hyun discovers a agonizing truth: he has absolutely no talent for cultivation whatsoever. Standing amidst world-shattering immortal beings and deadly demonic beasts, he is easily killed early into his journey. However, upon his death, Eun-hyun triggers his unique ability—a absolute reset, sending his consciousness back to the moment he first arrived in the cultivation world with all memories intact. Unwilling to succumb to despair, Eun-hyun embarks on a brutal, centuries-long crusade of self-improvement. Through dozens of lifetimes, endless heartbreak, and grueling discipline, he polishes his martial arts, understands deep cosmic laws, and masters the sword, slowly transforming from a talentless mortal into an immortal powerhouse through the sheer weight of accumulated experience and unyielding perseverance.