Jae-yoon and his direct junior, In-ho, head down to Eden Hotel, right below their air defense unit, for an errand. Upon arrival, they find a plane crashing into the heart of Seoul, and the hotel turned into a bloody chaos. Meanwhile, Young-joo and Jin-wook also confront zombies and team up with Tae-shik, who happens to be passing by. Together, they begin their fight for survival.