Scholar Who Walks the Night

A rumor circulates about a vampire living in the Palace, but Crown Prince Jung Hyun keeps his worries from his close friend Seong-yeol.

Seong-yeol admits to Soo-hyang that he nearly bit Yang-sun because her irresistible scent triggered his vampire instincts, and he expresses sorrow over his cursed life, constantly craving human blood. Meanwhile, Lee Yoon discovers that Yang-sun resembles a lost friend, sparking his curiosity about her.

Yang-sun is determined to assist Sung-yeol in finding the journal, while Crown Prince Lee Yoon relentlessly pursues anyone who challenges the authority of the crown.

Sung-yeol spots a familiar face and is convinced he's seen Myeong-hee, but he's mistaken and ends up being attacked by the guards.

Yang-sun's father is pressuring her to stop searching for the memorandum and Lustful Student. Meanwhile, Sung-yeol and his team have uncovered new clues that help them make predictions about the culprit's identity, though Yang-sun remains uncertain.

Gwi turns increasing numbers of sangmins and cheonmins into vampires, leading to even greater chaos.

As the full moon rises, Soo-hyang and Ho-jin grow anxious and continue their search for Sung-yeol.

With vampires on the loose, Sung-yeol attempts to send Yang-sun home, but she refuses to leave. Meanwhile, Gwi and Hye-ryeong join forces to plan their next move against Sung-yeol. Yang-sun finds herself in trouble, and no one knows how to help her escape the danger.

Yang-sun's father insists that he is the man the kingdom is after, after being confronted; Sung-yeol doesn't want to lose her father.

Yang-sun's father dies in prison, and Crown Prince Lee Yoon is informed that she will be made a palace slave. Sung-yeol works to help her escape from danger and discovers the memorandum hidden in a closet, bringing him closer to completing his mission.

Yang-sun decides to end her life by jumping off a cliff, but Sung-yeol acts quickly and rescues her from the edge.

Sung-yeol and Crown Prince Lee Yoon have a confrontation to address issues concerning Gwi.

Sung-yeol realizes that someone close to him is involved in the scheme and discovers that Yang-sun is missing. Meanwhile, Hye-ryeong finally encounters Yang-sun.

Yang-sun faces grave danger when Gwi and Crown Prince Lee Yoon uncover her past and connections. Sung-yeol resolves to protect her, believing she is crucial to reaching Gwi. Meanwhile, Hye-ryeong discovers Sung-yeol in a vulnerable state.

Sung-yeol finds himself in trouble after losing his black robe. Yang-sun comes to his rescue while being pursued by Crown Prince Yoon. Meanwhile, Gwi grows increasingly determined to find both Yang-sun and Sung-yeol to put an end to everything once and for all.

Soo-hyang readies Yang-sun to meet the royals, as she is set to assume the role of someone’s daughter following the king's request for all of them to come to the palace.

Sung-yeol witnesses Gwi strangling Yang-sun and confronts him in a fight. Although he loses initially, Yang-sun's blood transforms him into a man she has never seen before. Meanwhile, the Kingdom collapses with Prince Lee Yoon falling on the battlefield.

Gwi secures a position in the palace, while Sung-yeol relives his past through a series of dreams. He awakens to find Yang-sun anxiously by his side. Together, they experience a brief moment of calm before the impending storm.

A wounded Sung-yeol is rescued by a young girl who recognizes him as the revered Night Scholar hero admired by the villagers.

Sung-yeol vows that it will be the last day of Gwi's long life. The prolonged wait is finally over as the plans are ready to be put into action.