The world is on the brink of a sixth major mass extinction. Those who have survived do not see themselves as the lucky ones - rather as the cursed. Devin is desperately searching for Tess. He has changed, becoming ruthless and angry. Anyone who stands in his way will be mercilessly destroyed. Travis mourns Lori, but Cassidy gives him hope. The two embark on a treacherous journey through the wasteland that was once America, in search of Tess and Devin. Chancellor Horton took a new virus with him during his escape - deadlier than death itself. He remains determined to carry out his plan for world domination. As the Earth hurtles toward its final destruction, Devin, Travis, and Cassidy try to find their loved ones. Can they complete their adventurous journey and finally start a new life?.