During a stressful night of All Hallows Eve, Lyra faces the end of her life at the hands of her enemy kingdom's crown prince, Altair Antares. Along with his family, Altair is determined to possess the mystical tarot cards, willing to pay any price for ultimate understanding and possession of the abilities they grant. Unbeknownst to him, the power he is seeking from Lyra is already in motion, and when she dies, that power grants her a second chance at life by transporting her back in time sixteen years-where she emerges as her seventeen-year-old self with a determination to triumph over Altair, the formidable antagonist, along with all the malevolent forces aligned with him.

Equipped with newfound life and profound knowledge of what lies ahead, Lyra is unwavering in her purpose to alter the fate of her family, her kingdom, and herself. Lyra suspects Altair has gained power from enchanted tarot cards and believes he might not be entirely human, so she attends Crescencia University, a neutral ground where Altair also goes to school, to investigate him further. Her growing familiarity with him leads her to question her hatred and realize she may have unfairly judged him. Lyra and Altair's goals become complicated when they feel irresistibly drawn to each other, causing a distraction in both of their plans. Despite their tumultuous past and his family's ties to the infamous raven-masked assassin, Corvus Noir, who has targeted Lyra, she feels torn between her loyalty to her family and her growing intrigue toward Altair.

Alongside her beloved twin brother, new friendships, and mentors, Lyra reminds herself of the destruction of the man who, given the chance, will take it all away from her if she lets her guard down. Lyra must navigate through her conflicting emotions while also keeping her own people, family, and allies away from the future dangers she witnessed.