This brief story begins with a third-person account of the arrival of a mysterious inventor to the peaceful Welsh town of Llyddwdd. Dr. Nebogipfel takes up residence in a house sorely neglected after the deaths of its former inhabitants. The main bulk of the story concerns the apprehension of the simple rural folk who eventually storm the inventor's "devilish" workshop in an effort to repay supposed witchery. Nebogipfel escapes with one other person—the sympathetic Reverend Elijah Ulysses Cook—in what is later revealed to be a time machine.