He grabbed his laptop and started booking a flight. The song was called "Dangerous," after all. It would have been an insult to play it safe now.
Leo looked at the MP3 file on his desktop. It was 8.4 megabytes of data that had sat on a forgotten server for twelve years, waiting for someone to look at the "noise" instead of listening to the music.
But as he zoomed into the frequencies above 20kHz—the range silent to the human ear—the "ghost" appeared.