The album's blog gives us a few precisions: there is some music, androids, some dragon, a threatening goddess, a teenager (or two), Vineans...

"The temple of immortals" ends the trilogy with "The servante of Lucifer" and "Khâny's secret".
It is about the future of the Vineans on Earth. A future for which they have a disagreeing vision with the Vineans on Vinea. Yet more difficult decisions for Khâny...
This album is more "heroic fantasy"...

The album's blog also tells us that the story will start with Ingrid, just before Yoko rejoins the Vineans on Earth...
there she will meet back with Zarka who is having some difficulties with an environment she's rejoined after 8 centuries, we will also meet a new young heroine...