In Birth of a Hero, Choi Han, a kind protagonist, undergoes a tragic loss, propelling him into a vengeful journey. His encounter with a troublesome noble sets the stage for a twist of fate, as Kim Roksu wakes up in the noble's body, determined to change his destiny. Armed with knowledge of the future novel and newfound wealth, Roksu aims for a peaceful existence. Yet, his actions may defy his wish for a carefree life and alter the course of the story in unexpected ways.