Queen Wongyeong (Cha Joo-young) confronts the devastating loss of her brothers due to King Taejong's (Lee Hyun-wook) ruthless decisions. Amidst political turmoil, she uncovers corruption involving Sook-beon and Grand Prince Yangnyeong, leading to Sook-beon's exile. The Queen urges the King to reconsider the succession, advocating for Prince Chungnyeong as the rightful heir.