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. Joseon's most chivalrous fighter, a man who lived his life with determination, Dong Soo! Orphan. Beggar. From being an outcast, he upended the entire nation with the sword of the people.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 Dong Soo fills us with thrilling, vicarious satisfaction and hope.

Today, modern people have even lost love for each other. We shout that the core value of the universe is love, and our life is all about a fight to find that love, but we hide from our closest friends and family like an actor. So we become the loneliest people in the world, dreaming of futile escape and wasting the precious gifts of life. Through the stories with mixed fates, we realize that true love and salvation of the soul are the restorations of humanism. As society rapidly advances, we have become psychological nomads. Where is our haven? This drama is about the restoration of humanism. Humanism and devotion between family members are what we need.

At 8-years-old, Yong witnesses his father's murder. This leads to Soe Dol adopting Yong and marks the beginning of Yong's life as a ruffian. Unlike most noble women, Eun Chae is smart and shrewd. She envisions the concept of an inn and goes into business with her father to establish Joseon's first-ever upscale inn. While doing so, she finds herself falling for Yong, who keeps himself hidden behind his black mask. Yong realizes that there is more than meets the eye regarding his father's death and decides to dig deep to investigate the matter. While searching for a special design pattern etched on the sword that took his father's life, Il Ji Mae begins his quest of taking revenge against evildoers.