A world that thinks it knows its own story gets invaded by something that doesn't belong in the book. The Volunteer Army isn't ready because the world wasn't ready, no one told them there were rules they didn't know about. What starts as a straightforward defense becomes a race to rewrite the chronicle before the Black Army erases everyone from it.
A legendary book records everything that transpires across the world, but when the Black Army invades the isolated continent of Yggd, half of it falls into enemy hands. The delicate balance maintained by regional kingdoms shatters overnight as this conquering force sweeps across the land, leaving devastation in its wake. Yuri leads a hastily assembled Volunteer Army against overwhelming odds, but their initial resistance crumbles beneath the Black Army's relentless assault. With the capital occupied and the Chain Chronicle split between two powers, the fate of the entire world hangs in doubt. The remaining half of the book becomes humanity's only hope for understanding what comes next, yet knowledge alone may not be enough to turn the tide. Survivors must band together and venture into dangerous territories to rally allies and uncover the truth behind this invasion. Every battle matters when the very record of existence itself is at stake. This is a story of desperate people fighting to reclaim their world before the Black Army rewrites history itself.