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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.
Ma Dong-chan
Go Mi-ran
Na Ha-yeong
Son Hyun-ki
Ma Dong-sik
Mi-ran's mother
Hwang Byeong-sim
Oh Young-sun
Ma Dong-joo
Hwang Ji-hoon
Tarry
Go Nam-Tae
Park Yoo-Ja