Christine Kuehn, an author and researcher, uncovers her family's shocking ties to Nazi-era espionage and Pearl Harbor, sparked by a mysterious letter in 1994. She shares the intense journey of meeting Aunt Ruth and discovering their dark past. Mark Schiappone, her research collaborator, highlights how they found shocking historical evidence, including an FBI file, revealing their family's role in intelligence gathering for Japan. Together, they discuss the struggle of reconciling with their ancestry and the burden of hidden family secrets.