When Kane Cross uncovers a hidden journal from his missing father, it reveals coordinates to the Obsidian Labyrinth, a massive, multi - tiered subterranean structure built by a civilization erased from history. But powerful enemies are already watching. Hunted by ruthless antiquities syndicates, Kane hires Marcus "Barge" Miller for protection and firepower. Marcus brings in Silas Caelum a quiet drifter who moves through ancient ruins like a shadow and who knows for more about the Labyrinth than he will ever say. Some maps don't lead to gold. They lead to secrets that should have stayed buried.