Set in New England in the late 1920s, two friends Randolph Carter and Joel Manton spend a sunny autumn afternoon in a remote 17th century cemetery. An argument arises, concerning the horror stories written by Carter especially one story that draws Manton's sarcasm. It's centered around a creature so horrifying, that it cannot be named or described: the Unnamable... Manton, as a schoolteacher and firm believer in science, can`t imagine anything that could be truly unnamable. Encouraged by the atmosphere of the old burial ground Carter tells his friend about the origin of the story. He claims it to be based on a local legend that is over 200 years old. A legend about a strange old man, who was rumored to have a terrible creature locked up in his attic. Manton listens with increasing fascination, as darkness descends on the cemetery, when suddenly they become part of the legend as well...