For us who live in the 21st century, who is our true hero? It's neither the president who holds power in his hands nor the businessman who holds a fortune in his hands. An Junggeun, who protected the pride of the people through single-shot loyalty, is our hero. Kim Yuna, who rose from a poor upbringing to win the gold medal, is our hero. Joseon in the 1700s. The one who would become the hero of the war-torn people. Born penniless with only the clothes on his back, he must fight against the world crying justice, he must loftily defend the powerless people suffering under the violence of those who possess power, and he must grasp the sword not with the righteousness of his hand, but of his heart. The cherished hero of the people of Joseon, the drama centers on the determined path walked by this very hero. Joseon's most chivalrous fighter, a man who lived his life with determination, Baek Dongsoo! Did you say he was one who understood the people, one who could even save the country? Orphan. Beggar. From being an outcast, he upended the entire nation with the sword of the people. From a wandering swordsman to a top-ranked soldier who guarded the king. Born with nothing but his two fists just like us, achieving the ultimate martial arts from complete nothingness, the life story of Joseon's master swordsman Baek Dongsoo fills us with thrilling, vicarious satisfaction and hope. Not your imaginary martial arts that involve walking on water or flying through the skies, within an elaborate story, understated fight scene action unfolds! Elaborate and skillfully woven to be sweeter than mead, the story quenches the thirst of viewers who tire of run-of-the-mill historical dramas with fresh impact. Lending previously crude, unremarkable martial arts scenes gravity, the martial arts scenes portray the characters' emotions cut by cut.