The final, never-before-published book in USA Today bestselling author Nicholas Sansbury Smith's propulsive post-apocalyptic series about a soldier's mission to save the world.

In Europe, Master Sergeant Joe Fitzpatrick and Team Ghost return from a mission deep into enemy territory only to find that the Variant army has grown stronger. And, they are advancing toward the EUF's final stronghold in Paris.

Back in the United States, President Ringgold and Dr. Kate Lovato are on the run. The Safe Zone Territories continue to rally behind the ROT flag, leaving Ringgold more enemies than allies. But there are still those who will stand and fight for America. Commander Rachel Davis and Captain Reed Beckham will risk everything to defeat ROT and save the country from collapsing into Civil War.