Concubine Choi uses her beauty to conspire with her brother Choi Geol and bribes the swordsman Jang Mu-ryeok to frame Heo Do-yeong's faction as traitors and brutally murder them. Meanwhile, Heo Do-myeong's faction plots to have Hyang-a, the daughter of the deceased Hong Go-ri, enter the palace to overcome Concubine Choi's beauty and regain power. However, the swordsman Park Pil, who protects Concubine Choi, stands in their way, preventing them from achieving their goal. Exploiting Park Pil's love for Hyang-a, Hyang-a succeeds in contacting the king. Jang Mu-ryeok also learns the full truth about Concubine Choi and reports the facts to the king, leading to the execution of Choi Geol's faction. Hyang-a, who unwillingly becomes a concubine, embraces the dying Park Pil, struggles, and ultimately commits suicide with him.