Mandrak, the "defense against the dark forces of the 7 dimensions" teacher spends more time traveling the world plugging dimensional cracks than giving lessons. But his students respect him. After all, it was he who imprisoned Uchtul in the past, and anyway he always brings back strange souvenirs with amazing stories to go with them. But lately, Mandrak's pupils are a bit worried. He's strangely grown and more often than not now he ends his classes with a demonic cackle. Milton is wondering whether his teacher's prolonged contact with putrid dimensions might not provoke the very catastrophe he was trying so hard to avert!