Young-joo, focused on adjusting to her new job, grows tired of her boyfriend Jae-yoon's constant complaints and breaks up with him. When Jae-yoon sends her a heartfelt message, she heads to see him. But on her way, she faces an unexpected incident.
Jae-yoon and his junior, In-ho, head down to Eden Hotel for an errand when they find a plane crashing into the heart of Seoul, and the hotel turned into bloody chaos; Young-joo and Jin-wook confront zombies and team up with Tae-shik.
Soo-jeong and chef Jung from the Eden Hotel, Jae-yoon and In-ho manage to return to the military unit; the find out the base they thought was safe begins to face the threat of zombies; Young-joo sees the text messages sent by Jae-yoon.
In the midst of the zombie crisis, Jae-yoon and Young-joo reminisce about their happy past and long for each other even more.
Lee Jae-yoon, a soldier serving his compulsory military service, breaks up with his girlfriend Kang Young-joo; when a zombie outbreak occurs in Seoul, they both race to reunite with each other.
Young-joo gathers supplies to battle zombies in a metro staff office; Jae-yoon's group arrive at Eden Hotel and meet survivor Arron Park.
Park Jeong-min
Lee Jae-yoon
Jisoo
Kang Young-joo
Lim Seongjae
Ra In-ho
Kim Joon-han
Aaron Park
Hong Seo-hui
Oh Soo-jung