Even on the day of his divorce, Constable Jim Castle just wants to get back to his family, but no one can risk going outside. Not anymore. Worse still, when the fallout starts, Jim is hostage to a gang of armed thieves in a rundown farmhouse. Their plan is simple: wait it out as the radioactive ash piles higher and try not to kill each other. But they don’t have to worry about any of that. Because all their assumptions about what caused the end of the world are about to be snatched away – like a body into the ash.