Aurora’s hands shook as she unfolded the yellowing paper, its edges brittle with time. Her father’s handwriting stretched across the page in strong, confident strokes, each word carrying his voice back to her as if he stood once more in the room.

“If you are reading this, my daughter, then they are already moving against you. I could not stop them in life, but I have prepared for this moment. Inside this safe are the keys you will need truths they have buried, and weapons they fear. Do ...