Park Kyung and Woo Jiho have been best friends from the day they had met. Attached at the hip, and they wouldn't dream of leaving each other behind for any reason. That is, until a strange new virus threatens the inhabitants of Seoul. Split up by circumstances, both boys must make some new friends and fight their way through a city where monsters roam the moonlit streets. Lives are lost, and others found, all in search of a cure.