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, Won Jin-a, Yoon Se-ah, Im Won-hee, Kim Won-hae, Kil Hae-yeon, Shim Hyung-tak Added on Amazon Prime 2023-03-24.