In the middle of the holidays, a biological attack wreaks havoc on the U.S. The virus is quick. Deadly. Unstoppable. The country is left in tatters. For Isaac Race, it’s especially bitter. After the death of his parents and sister, he was just getting his life back on track - the weaponized virus changes all that. Battered by the fresh deaths of his foster parents, but hardened by the year he’s endured, he emerges from the temporary safety of his home to seek out other survivors during the worst winter in years.

Half of the earth's population has been wiped out. Impossible to predict or stop, the Gamma Ray Burst tore through the Earth like a bullet, its radiation wave killing hundreds of millions, and the after effects ensuring the deaths of billions more.

If society fell apart, could your family survive? Jim Powell thought he was ready. He was a regular guy who travelled a lot for work and hated every second he was away from his young family. But when ISIS operatives unleashed a coordinated attack on America’s infrastructure, his entire world shattered. The electrical grid collapsed, communication networks were damaged, critical bridges and dams were destroyed, and major fuel refineries have gone up in massive fiery clouds.

John Eric Carver and Shrek are a retired Navy SEAL war dog team, now living in the mountains outside of San Diego. Both man and dog thought their life was now settled, finding peace on the 40-acre ranch they had moved to. But life, and a mutated virus, changed all that.

It was just a random mutation - one of a billion that happen in viruses every day. But this one was different. It exploded out of Somalia and spread across the oceans before anybody thought to look up from their cell phones to see what was going on. The infected breathed the virus into the air around them, spreading it through the cities faster than anyone thought possible. Hospitals were overwhelmed. Police lines crumbled. Quarantine sites disintegrated. Cities started to collapse.