Love Song for Illusion

Sajo Hyun, the Crown Prince harbouring an alter ego, encounters a woman in the fabric shop. She is Yeon Wol, the lone survivor of the Yeon family annihilated a decade ago. Driven by a vow to avenge her parents' demise, Yeon Wol now stands poised with a knife aimed at the King's throat, marking the imminent fulfilment of her pledge. 

Ak Hee's clever maneuver results in Yeon Wol losing all her memories, placing her on the brink of becoming the Crown Prince's concubine. However, her innate instincts drive her to break free and discover her true identity and rightful place. While wandering beyond the palace confines, she crosses paths with Sajo Hyun and, with hesitation, chooses to return to the palace, unknowingly stepping into a web of schemes set to engulf her. 

With Sajo Hyun's quick thinking, Yeon Wol manages to narrowly escape the life-threatening scheme. Overwhelmed with gratitude, Yeon Wol tries to express her thanks, unknowingly reopening deep scars for Sajo Hyun. Sensing vulnerability, Ak Hee seizes the moment to assert control over Sajo Hyun's body, eventually aiming to lock him up permanently.

Yeon Wol, having regained her memories, prepares for the long-awaited revenge she has devoted her life to. Meanwhile, a clever move by Chung Ta allows Sajo Hyun to avoid the binding ritual. Gradually, Sajo Hyun finds comfort in Yeon Wol and starts to open up to her. A rumour swiftly spreads throughout the palace about Yeon Wol's true identity.

Following the enigmatic 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. Meanwhile, Sajo Hyun finds himself unable to shake off the thoughts of Yeon Wol, who implored him to believe in her innocence. In the end, Hyun opts to enter into a precarious arrangement with Ak Hee in a bid to rescue Yeon Wol. 

Sajo Hyun wakes up in the middle of a kiss between Ak Hee and Yeon Wol and has no idea what situation he is in. With the passage of time, the intimacy between Hyun and Wol intensifies.At the same time, Hyun becomes aware that Yoong is involved in questionable activities, yet he feels powerless to take any action against him. Nevertheless, he discovers a motivation to oppose Yoong.

As the newly crowned king, Sajo Hyun becomes aware that there are more watchful eyes and attentive ears than he had initially expected, closely monitoring his every move. Meanwhile, Sajo Yoong is busy concocting another scheme. Simultaneously, Yeon Wol, covertly supporting Hyun as a court maid, catches wind of the news that Hyun is slated to spend the night with the Queen.

Ak Hee realizes who holds Yeon Wol's unwavering love, and a wave of jealousy washes over him. Yeon Wol notices suspicious activities within the palace and embarks on an investigation. Meanwhile, Yung, who harbours suspicions about Sajo Hyun's true identity, approaches Chung Ta for a favour. 

Yeon Wol chooses to leave the palace, encouraged by Ak Hee's commitment to assist Sajo Hyun. Meanwhile, Sajo Hyun, facing the ongoing disappearance of women, finds himself compelled to make a pivotal decision as the King. Yeon Wol, driven by the urgency of the situation, sets out on her own to rescue the missing women.

Word begins to spread about a troubling rumour suggesting that an evil spirit has taken possession of the King. Sajo Hyun quickly identifies the source of the rumour. Upon his return, he faces the challenge of restoring the rightful order within the royal family. Simultaneously, Ak Hee unwittingly becomes ensnared in Sajo Yoong's trap, compelling him to extricate himself from Sajo Hyun's body.

As the contagion continues to spread, more people are shifting their allegiance toward Sajo Yoong, who is presently incarcerated. Meanwhile, Sajo Hyun, incapacitated by a Suma dart, remains immobile and speechless, while Ak Hee endeavours to maintain stability within the nation. Yeon Wol diligently seeks any clues that might guide her to Chung Ta in a desperate attempt to rescue Sajo Hyun. 

Ak Hee, betrayed by Chung Ta, finds himself immobilized with a dagger lodged in his back. Though Sajo Hyun regains consciousness, he is also incapacitated and unable to assist Ak Hee. With both Ak Hee and Hyun bound, the situation worsens as Sajo Yoong is released from prison. Meanwhile, Yeon Wol is risking everything to rescue Hyun and finally receives a glimmer of hope from Chung Ta.

Following the loss of his memories, Sajo Hyun initiates a new chapter beyond the confines of the palace. Although reunited with Yeon Wol, his recollection of her identity may be absent, yet their profound connection persists, transcending the obstacles of his amnesia. Meanwhile, Yeon Wol embarks on a journey to honour her commitment to the antidote. Upon learning of her endeavour, Sajo Hyun sets out in search of her. 

Ak Hee realizes that his presence is slowly fading away, and knowing all this, Chung Ta makes a tempting offer. Meanwhile, Sajo Hyun and Yeon Wol are in shock and confusion when they find out that Geum Hwa has conceived a child. Seeing that Yeon Wol is not in her right mind, Yang Jae Yi takes a rather extreme measure to address the situation. 

Having gained access to Ak Hee's memories, Sajo Hyun discerns the deception that has ensnared him and promptly rushes back to the palace. With Yang Jae Yi's demise, Yeon Wol emerges as the anticipated successor to lead the Daggers of the Wind. Meanwhile, Ak Hee is determined to acquire the dagger to execute his plot to eliminate Sajo Hyun. 

After a fierce confrontation between Ak Hee and Sajo Hyun, Ak Hee successfully plunges the dagger into Hyun. Simultaneously, Sajo Yoong readies himself for the throne. Meanwhile, Sajo Yoong employs a cunning tactic, injecting a poisoned needle into Yeon Wol, who collapses immediately afterwards. Ak Hee becomes consumed by what he perceives as love for Yeon Wol.