Before we knew how disease spread, medicine was as much superstition as it was science. And in the small New England towns of the 1800s, there is a belief that consumption can only be stopped by making sure the dead are actually dead.

In 19th century Ireland, folklore has a strong hold. Michael Cleary is convinced his wife, Bridget, has been replaced by a fairy called a changeling. And his belief drives him to the most extreme act ...