"Power and authority, that's all the world is." A beggar's life, the orphan of the Dong-A faction, Unbi. The weakest of them all, simply because he lacks power, he chooses the path of a eunuch to escape this damned fate. Unbi receives the seed of the unparalleled martial skill, Baekilhong, and, as part of the Emperor's scheme in the [Great Martial Arts Annihilation Plan], he joins the imperial palace's special forces, the Nachal Gwiro. The era of great upheaval has begun, and amidst the endless power struggles and fierce battles, The story of 'Unbi,' a figure known for his ruthless cunning and extreme cruelty, a master of ice techniques, navigating through the world of martial arts!