Dr. Henry Armitage is the erudite head librarian of Miskatonic University, deeply versed in the Necronomicon. After Wilbur Whateley's death in the library, Armitage pieces together the full scope of the Whateley plan.
He rallies Professors Rice and Morgan and travels to Dunwich, where Wilbur's twin — a vast, invisible abomination — is already ravaging the countryside. Through arcane means, Armitage destroys it.