Silas of House Shax had his work cut out for him, a world left reeling after an end of the biggest war that the entire supernatural world has ever seen, the two factions that vie for the control of the underworld, and too many terrorist organisations that all want to kill each other. He's stuck in the middle of it despite his best wishes and fate continues to give him the finger.

The world was shaken by the arrival of the Sirens, and even further by the appearance of their defenders; the Kansen. Now the world stands united as it faces off against extinction, or is it? Follow the journey of a young soldier of the Iron Blood as he faces off against not just the Sirens, but the threat that lurks from home too.