All the apartments within the complex get infected, except Building 101. The phone lines and Internet get disconnected, and they are all on their own. Sae Bom and Yi Hyun struggle with the constant conflict between the renters and owners inside the building, including the people outside. Meanwhile, their food depletes, and they are left with only one option, to go outside.
Elenco: Han Hyo-joo , Park Hyung-sik , Jo Woo-jin , Park Joo-hee , Lee Ji-ha , Bek Hyun-jin , Park Hyung-Soo , Han Da-sol , Park Hee-von , Moon Ye-won , Kim Young-woong , Na Chul , Cha Soon-bae , Lee Ju-seung , Han Jun-woo , Yoo Ji-yeon , Bae Hae-sun , Kang Han-saem .