After they return from their mission of obtaining food, the people inside won't believe anything they say about what they saw. Everyone starts to doubt each other, and distrust builds up among them as they hide their true feelings. Meanwhile, the personal trainer locked up in the fitness center turns into a monster, putting fear in the people of the building.
Han Hyo-joo
Yoon Sae-bom
Park Hyung-sik
Jung Yi-hyun
Jo Woo-jin
Han Tae-seok
Lee Jun-hyeok
Kim Jeong-guk
Park Joo-hee
Lee Ji-soo
Bek Hyun-jin
Oh Joo-hyung
Baek Joo-hee
Park Min-ji
Moon Ye-won
Woo Sang-hee
Park Hyeong-su
Kook Hae-seong
Jung Woon-sun
Shin So-yoon
Bae Hae-seon
Oh Yeon-ok
Cha Soon-bae
Sun Woo-chang
Han Jun-woo
Kim Se-hyun
Park Hee-von
Na Hyun-kyung
Na Chul
Na Soo-min
Kim Young-woong
Go Se-gyu
Lee Ji-ha
Jo Ji-hee
Lee Ju-seung
Andrew
Han Da-sol
Lee Bo-ram
