In Saline, Michigan, four teenagers are caught in a world gone mad. The bird flu has wiped out billions of people worldwide. Those still alive are forced to not only remain free of the deadly strain of flu, but fight gangs of rogue looters and deadly killers. Forced to flee, the four teens decide to head north, in hopes of finding safer, less populated areas. They willface dangers they never could have possibly imagined in a world that, no matter what happens, will never be the same again.