Theobard’s solitary, silent existence, since being abandoned at the Sanctuary by his parents as a child, is turned upside down by the sudden arrival of a fascinating mechanique—a beautiful golden-eyed girl called Dellia.

Through Dellia, he discovers secrets of his past, things previously unknown that make him special.

But Dellia has secrets of her own, and when he finds out, Theobard must endure the betrayal he feels.