On a seemingly normal day, everything starts to go wrong.
All over the country, and the world, there have been people sick for the last week with something that feels flu-like, and includes appalling migraines. Now people are reaching the critical point of the illness: what temporarily relieves the pain of the headaches is killing people.
And a lot of people have guns.
What's especially notable about this book is that Hayton does it without making it a polemic on either side of the gun issue. It isn't about guns, or gun owners, being either good or bad, responsible or irresponsible. It's about what a new and nasty disease does, and the desperate measures people are driven to as they try to understand what's going on, and how to survive.