Billions are dead and millions are still dying from the virus that emerged from the depths of nature. Arthur, now reunited with his wife Wendy, is trying to strengthen the safety of the ranch as the walls of society collapse.

Keeping the thought of their son Joseph in their hearts, Arthur and Wendy keep moving forward. Finding more kids every time they leave the ranch, their family continues to grow, but Nature isn't finished with the lessons of survival.

Humans will always be a threat, but Nature is much more brutal ... and relentlessly terrifying.