The NOMAC symbols likely are parts where they come into the story...The entire album sounds more of a narrative than SFAM, an actual Rock Opera in the vein of Ayreon, much like The Theory of Everything, which I enjoyed immensely.
It starts off with the NOMACS which will have a theme of their own, basically their songs.
Then, The Entire empire is introduced. I see an opening scene where they show a sky view of the city full of life. Everyone's doing things, a futuristic kind of Metropolis.
The gift of music. could be where the story really begins to form. As it plays for the citizens, one realizes its potential, beauty and power. He then figures out that the NOMACS which have songs to seduce people in a trance like state to conform. Thus finding out their is a better life than that of the Empire,
At this moment we are introduced to the ruler the one lord Nefaryus, which could be a nice heavy song.
The rest is just too much for me to type up on my phone. but damn, This is gonna be one awesome album.
I feel it's gonna have a nice flow with a lot of transitions, which are broken by the NOMACS and their songs.