The song was showing him every "What If" he had ever buried.
As the song played, Luka noticed something strange. The lyrics weren't just sounds; they were memories. As she sang, he saw a version of his own life flickering on the wall of his apartment. He saw himself taking the job he had turned down. He saw himself calling the girl he had let walk away three years ago.
The woman’s voice stopped being a recording. It came from right behind his ear.