Arthur appears to be nothing more than an aging, rum-soaked janitor mopping corridors at the prestigious St. Grace Academy of Magic. His teenage son Lucas, an aspiring young sorcerer enrolled at the school, burns with constant humiliation over his father's disheveled appearance and drunken boasting. Unbeknownst to the mocking student body and his resentful son, Arthur is actually the immortal grand archmage who saved civilization from demonic annihilation three centuries ago, having concealed his celestial aura to live a peaceful life.
When void beasts breach the academy's perimeter wards and dark cults resurrect ancient apocalyptic entities, Arthur intervenes from the shadows to protect his son. As the academy's elite archmages fall in battle, Arthur must drop his broom and unleash primordial incantations. Lucas faces a staggering awakening as he discovers that the father he despised is the ultimate protector of reality.
