'Once upon a time' is part 1 of a 3 part story reenacting legendary space explorations. Chapter 1 explores euphoric emotions on the way to arguably one of the most historic moments of our time. Throughout the song, progressing synths symbolise the various atmospheric layers experienced during the mission. In its essence, the song pays tribute to, in my opinion, mankind's greatest achievement - landing a man on the moon. You won't want to miss this!