A middle-aged father takes his thirteen year old daughter on a hike in the Rocky Mountains in an effort to recapture the relationship that he longed for, but an apocalyptic event caused them to set off on an adventure like no other. Makenzie Kincaid wanted nothing to do with the backpacking trip that her dad was forcing upon her. Things got worse than either of them could imagine after they had to spend the night on top of the mountain without shelter. On the way down the mountain from their harrowing adventure, they learn that everyone had died from an ominous orange fog that covered the landscape. Now Mackenzie and her father are left to trek across a wasteland hoping against hope that their family hadn't succumbed to the mysterious orange fog. The duo find that there are other survivors, but they aren't the same as they were before the fog...