Scott Wolter visits a mysterious cave in rural Pennsylvania that made headlines when it was first discovered in the 1980s for reportedly having cultural connections to pre-revolutionary America. Wolter’s investigation leads to the discovery of a strange artifact that may be the remnants of a fraternal society that used the cave for rituals. During his search, he interviews local historians and members of the community, discovering that throughout time, the cave may have been home to some of America’s most important historical events as well.