They told David it was impossible - that even the Reckoners had never killed a High Epic. Yet Steelheart - invincible, immortal, insurmountable - is dead. And he died by David's hand. Eliminating Steelheart was supposed to make life easier. Instead, it only made David realize that he has questions. Big questions. And in Newcago, there is no one who can give him the answers he needs. Some of those answers he found in Firefight. Now he must decide what to do with them. Calamity is about what one does to fill their heart once they have revenge.