I'll be upfront but I cannot lob spoilers out. It could be considered a "sad feels" album at certain points, but the story behind it isn't grimdark. It's a pretty light story from a technical standpoint, but the central conflict does wreak a lot stress on the characters involved.

It is an album though, so the musical styling is important to note. The tracks blend in orchestral with progressive rock, and also make use of ambient styles to emphasise imagery. If the genres are not your thing then I hope you're either willing to give the album a listen after release just to try it, or because something else interests you. If not, well I can't berate someone for having their tastes, can I?