Elira, a college student in a new town, seeks answers about local vampire lore, only to stumble upon an ancient cathedral and awaken Kain, a 300-year-old vampire priest. Trapped between his compelling darkness and her desperate need for freedom, Elira discovers Kain’s disturbing obsession with her. Can she escape his predatory grasp, or is she destined to become his salvation—and his deepest sin?

Step into the shadowy halls of Nocturne University, an elite institution veiled in mystery, where secrets whisper in the dark. Aiah, vibrant and fearless, finds herself drawn to Mikha Lim, a transfer student whose eyes hold an abyss of ancient secrets. Their encounter ignites a dangerous dance of curiosity and undeniable pull, a connection deepened by an ancient blood bond. But in a world where vampires walk among humans and hunters lurk in the shadows, their forbidden connection could awaken forces beyond imagination. Will their crimson vow lead to ultimate power, or a destructive fate?