A cruel story that depicts the battles between concubines within the royal palace who turn to the dark side in their bid to gain love and power from the king. It will center around the beautiful but evil royal concubine Jo So Yong (Kim Hyun Joo) as she tries to gain the attention of King In Jo (Lee Duk Hwa) with her beauty and wit to control the power of the Joseon. When she succeeds, there is a bloody battle over the power she receives. By birth she was of a lower class, but used her extraordinary beauty to get the favor of King In Jo and managed come between King In Jo and Crown Prince So Hyun (Jung Sung Woon).
