Ma Dong-chan and Go Mi-ran are both frozen during an experiment. They wake up 20 years later instead of 24 hours later and must keep their body temperature above 30°C in order to survive.
Ji Chang-wook
Ma Dong-chan
Won Jin-ah
Go Mi-ran
Yoon Se-a
Na Ha-yeong
Im Won-hee
Son Hyun-ki
Kim Won-hae
Ma Dong-sik
Kil Hae-yeon
Mi-ran's mother
Shim Hyung-tak
Hwang Byeong-sim
Seo Jeong-yeon
Oh Young-sun
