Three hundred years ago, Evelyn, the Supreme Witch, sealed the Demon King Lucifer in the underworld and reincarnated as Ivy, an orphan with feeble spiritual power. Seventeen years later, Lucifer’s minions infiltrated Silver Thorn Academy, plotting to awaken the Demon King through a dark magic circle. After enrolling in the academy, Ivy formed fateful bonds with Kane, the Alpha Werewolf, Sebastian, the Vampire Patriarch, and Victor, the Demon Hunter Mentor — the three chosen guardians of the demon core. Lucifer set a trap to kill Ivy before her power awakened, but it instead triggered her dormant supreme abilities. Heirs of the three great clans joined forces to fight the Demon King, and Ivy, regaining her full power, banished Lucifer back to the abyss once more.