In the aftermath of the supervolcano's eruption in Yellowstone Park, North America is covered in ash. Farmlands cannot produce food. Machinery has been rendered useless. Cities are no longer habitable. And the climate across the globe grows colder every day. Former police officer Colin Ferguson's family is spread across the United States, separated by the catastrophe, and struggling to survive as the nation attempts to recover and reestablish some...

"An explosion of incalculable magnitude in Yellowstone Park propelled lava and ash across the landscape and into the atmosphere, forever altering the climate of the entire continent. Nothing grows from the tainted soil. Stalled and stilled machines function only as statuary. People have been scraping by on the excess food and goods produced before the eruption. But supplies are running low. Natural resources are dwindling. And former police officer...