Crown Prince Sajo-hyeon meets Yeon-wol at a fabric shop; she's the last survivor of her murdered family and seeks revenge; she holds a knife to the King's throat, ready to fulfil her vow.

After losing her memories, Yeon-wol nearly becomes a royal concubine; her instincts lead her to escape and search for her identity; after meeting Sajo-hyeon outside, she reluctantly returns to the palace, unaware of looming plots.

Yeon-wol escapes danger thanks to Sajo-hyun's quick thinking; her gratitude unknowingly triggers his past trauma; Ak-hee uses this vulnerable moment to control Sajo-hyun's body, planning to trap him.

With memories restored, Yeon-wol readies her revenge; Chung-ta helps Sajo-hyeon escape a ritual; as Sajo-hyeon grows closer to Yeon-wol, rumours about her real identity spread in the palace.

Following the demise of Sajo-seung, Yeon-wol, wrongly labelled as the assailant, harbours suspicions that Sajo-yoong is the true mastermind behind Sajo-seung's death; Sajo-hyeon finds himself unable to shake off the thoughts of Yeon-wol.

Sajo-hyeon wakes up in the middle of a kiss between Ak-hee and Yeon-wol and has no idea what situation he is in; the intimacy between Sajo-hyeon and Yeon-wol intensifies; Sajo-hyeon becomes aware that Sajo-yung is involved in questionable activities.