Katherine lived a quiet life. At 43, with no husband or children, her days were filled with work, books, and peaceful walks in the park. However, her tranquility was shattered last Thursday when she found an unexpected envelope in her mail.The envelope stood out among the usual bills and catalogs. It was plain but felt heavy. Inside, she discovered a flash drive labeled with the name “Tom” scribbled on it—Tom, her high school sweetheart and ex-husband whom she hadn’t heard from in over 15 years. Her heart skipped a beat, and she stood frozen, staring at his name. What could this mean?