Despite a treaty established two centuries ago to maintain peace between humans and vampires, the two groups continue to struggle with mutual animosity. In the midst of this ongoing conflict, Jung Jae Min, a sophisticated yet compassionate high schooler, finds himself irresistibly drawn to the enigmatic newcomer, Baek Ma Ri. However, Ma Ri must hide her vampire nature if she hopes to pursue a genuine romance. If these ill-fated lovers can muster the bravery to take a chance on each other, they might hold the solution to finally reconciling humans and vampires.