It's been over a year since zombies became something other than just popculture. Jonghyun and Key have been running and fighting for most of that year, and they finally find an abandoned cabin that might be safe for the night. They've been on their own for a few months now, and that's worked out just fine, but when Jonghyun finds Taemin on his own in the woods, they might have to add a third to their number.