After Scorpan betrayed Tirek, he left Equestria and friends he had made. But it was not without purpose. Scorpan betrayed one brother. He would not abandon another.

Volgar is the younger brother of Scorpan. Soon after Volgar becomes an adult, he has visions of a creature that he finds out is his older brother, Tirek.

He learns from Scorpan of what happened to Tirek. Volgar leaves his homeland, determined to rescue the brother he never knew despite Scorpan’s objections. But when he finally meets Tirek, reuniting the family will be far more difficult than he imagined.

Meanwhile, Equestia's royalty is in danger, as old powerful beings question Celestia's rule. To make matters worse, total war lingers over the land, with diplomacy being the only hope to settle the matter. And something… far more sinister lies in the deepest shadows of the world's core. Waiting. Watching. Planning.