The war is over, but its scars still shape life across Engrassia and the eastern frontier. Old strongholds lie abandoned just off the roads, imperial Remnant cells still haunt the countryside, and villages that survived the fighting are learning that peace does not always mean safety. When a string of strange animal attacks unsettles the eastern districts, the Strategic Office sends a newly formed team to investigate.

At its head is Captain Sandore Greycastle, a young officer on his first real command, joined by Lieutenant Miuki, a famous soldier; Corporal Kameutsu, an experienced scout; and a small military support team. Their investigation soon brings them to Leon Aster, a freelance adventurer who knows the region, and Pixal, a sharp-tongued Aetheris information broker with an unsettling interest in the evidence they have uncovered.

What begins as an inquiry into predator attacks quickly points toward something more deliberate...