In late October of 1928, authorities in the small town of Lake Bluff, Illinois discovered a grisly scene in the village hall basement. They found a young woman named Elfreida Knaak, naked, horribly burned and barely clinging to life, next to a furnace. From that point on, investigators would uncover a bizarre story, including a secret affair, mystical Christian rituals, and contradictory deathbed confessions.
My guest is historian Kraig Moreland, who has researched this hometown mystery for years. His book is called "Furnace Girl: The Mysterious Case of Elfrieda Knaak".

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