Lilian, a human woman living with the vampire House Mar, confronts Adrian and Louis, the two young masters she once considered brothers. She is confined and demands an apology for allegedly pushing another woman, Charlotte, into the water. Lilian pleads her innocence, reminding them of the past when they risked everything to save her from werewolves, contrasting it with their current cold distrust. As they insist she apologize, Charlotte surprisingly appears and reveals she was not intentionally hurt, hinting that someone else is responsible for the false accusation. The bond Lilian treasured now faces a stark betrayal, leaving her trapped with the real instigator unveiled.
A young woman arrives at House Mar, pleading to be taken in to avoid becoming a blood slave. Lilian, the human lady of the house, wants to help her due to their similar backgrounds, but Adrian, a young master, warns Lilian that not all humans are trustworthy. Years later, Adrian confronts Lilian, accusing her of maliciously spreading rumors and faking her affection for him and Louis to become the bride of House Mar. He declares neither he nor Louis will ever marry her. Realizing her years of loyalty meant nothing, a heartbroken Lilian decides to leave and accepts a marriage proposal from the heir of the Vampire Royal Family instead.
Dracula, a vampire prince, announces he will marry Lilian, a human woman, against his family's wishes. As Lilian anticipates leaving in three days, another woman invades her room, claims her belongings, and declares she will marry into the Mar family instead. Lilian demands the return of her photos, but the woman refuses. When Lilian retaliates, she is stopped and berated by someone for bullying the intruder, leaving her powerless and her future in jeopardy.
A woman reminisces about a promise made with Louis, a vampire, who once vowed to protect her like a knight, even creating a drawn photo together. The memory shatters when Louis now accuses her, Lilian, of being a vicious liar, defending another woman, Charlotte, as kind. He declares she doesn't deserve his protection. Facing his harsh rejection, Lilian gives up, stating she'll leave soon, but Louis calls for her to wait, leaving the confrontation unresolved.
After a bitter confrontation where Adrian tells Lilian to take her things and leave, she discovers her cherished crystal bracelet, a memento from her late parents, has broken. Her friends, Adrian and another man, comfort her and vow to help find the missing beads despite the danger of sunlight. While searching, they discover one of the beads is actually a hematite stone, a precious symbol of Adrian's family. He offers it to her, declaring she is now his family and dear little sister. In a tense turn, Lilian rejects the bracelet and the memories, declaring she wants none of it. She announces one final act to settle all debts between them, leading a horrified Adrian to shout for her to stop, fearing for her life.
A vampire man insists he owes a debt to House Mar and must use his sacred blood to repay them for past injuries, despite a woman pleading for him to stop. He agrees to one final payment, stating it will sever all ties with the house. Meanwhile, news spreads that the Prince plans to marry a human woman, causing outrage among other vampires. The Prince, however, presents his father with secured alliances as a bargaining chip to marry Lilian, declaring he wants both the Royal Family's glory and her. Lilian, confused by his devotion, is told the Prince is far more trustworthy than her previous protectors, hinting her suffering may soon be over.
The episode begins with Lilian announcing her departure while still wounded, which Adrian and Louis oppose. She claims her sacred blood healed them for years, while Charlotte took credit. Skeptical, Adrian and Louis dismiss her claim, calling her delusional and regretting taking her in. Lilian counters by presenting physical evidence of her sacrifices, but they remain unconvinced. Enraged, they order her to leave, mocking that she cannot survive alone. As Lilian prepares to depart, an unseen, powerful voice interrupts, challenging her expulsion.
The episode begins with the patriarch of House Mar chastising his two sons for mistreating Lilian, an orphan they vowed to protect. When a woman named Charlotte intervenes to blame Lilian, the patriarch strikes her, causing his sons to defend Charlotte and further blame Lilian. Lilian confronts the patriarch and declares her decision to leave the family. The patriarch begs her to stay, revealing his hidden motive: he needs her sacred blood to gain political power. While his sons assume she will not truly leave them, Lilian reflects in despair, realizing her entire life within the house was based on a lie.
As Miss Stuart prepares for a marriage arranged by others, another woman, Charlotte, confronts her, accusing her of scheming to win the affections of the vampires Adrian and Louis. Charlotte reveals a critical rule: a vampire can only successfully transform the woman he truly loves. She then deliberately creates a bloodshed, knowing the scent of blood could drive the nearby vampires into a frenzy. The episode ends with Louis struggling to control his instincts as the true architect of the danger, Lillian, is mistakenly blamed for the attack.
Born with sacred blood, Lilith is raised by vampire lords Adrian and Louis, sharing twenty years of deep affection. When the human Charlotte arrives with lies, she poisons the brothers' minds. They turn on Lilith, imprisoning and tormenting her, shattering all past tenderness. Heartbroken, she accepts the marriage proposal of Prince Dracula, who has long loved and protected her. Consumed by regret too late, Adrian and Louis desperately storm the wedding to reclaim her. The conspiracy is exposed, justice is served, and the exiled brothers watch as Lilith and Dracula ascend the throne as Vampire King and Queen.