In 1921, Mr. Ambrose Dewart returns from England to the grim landscape around Arkham to claim the inheritance of his great-great-grandfather Eliah Billington: a dilapidated house and a dark forest that conceals strange stone formations and an old masonry tower. The Billingtons are an ancient family from the legendary Dunwich, and some old residents of the area still have terrifying tales to tell about them. Gradually, through rummaging in the famous Miskatonic Library and poring over volumes of ancient occult knowledge locked away in the poison cabinet, he begins to uncover secrets that would have been better left hidden. Ominous signs accumulate, and it becomes clear that on the Billington estate lies one of those focal points where the dreadful old gods lie in wait to invade our world.