Princess Jungmyung enjoys a life of luxury until her half-brother, Prince Gwanghae, seizes the throne by executing the legitimate crown prince. Forced to leave the royal court, Jungmyung disguises herself as a man and learns to live among the common people, all the while remembering Gwanghae’s betrayal. As corruption spreads across the kingdom, will Jungmyung be able to seek revenge, restore justice, and reclaim her rightful position in the palace?