In 1842 one of the leading causes of death in America was tuberculosis. Dr. Croghan believed he found the cure for the disease deep in Mammoth Cave, the longest cave system in the world. He took his eleven patients underground into a village he constructed. This became the nation's first tuberculosis hospital. Miraculously, they began to recover. However the effects were short lived, and soon their village became one inhabited by ghosts. This story points at a past, and perhaps a future, darker than the cave itself.