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Alien invasions come in all shapes and sizes. This time, the Earth is under attack by "Unknown Codes" that infiltrate digital devices to eviscerate the human race. The only known way to counter these codes is to play their own game. An awkward mesh of men with different motives are recruited to fight. How is everything going to end?

Yoseob, normally very quiet and composed, is in the police station convicted of stabbing 8 civilians with a knife. Everyone's wondering whether he actually committed the crime. Does he, a mere high-schooler, really have any reason to have done such a horrifying act?Does his obsessive love for his older brother, Jaeha, have something to do with it?

After an unexpected family tragedy, a reclusive high school student is forced to leave his home -- only to face something much scarier: a reality where monsters are trying to wipe out humanity. Now he must fight alongside a handful of reluctant heroes to try and save the world before it’s too late.