Created by Studio Dragon and produced by writer Baek Mi-kyung's own company Story Phoenix, it aired on tvN every Saturday and Sunday at 21:00 (KST) from September 28 to November 17, 2019 for 16 episodes.

[1][2] Ma Dong-chan (Ji Chang-wook) and Go Mi-ran (Won Jin-ah) take part in a 24-hour experiment where both are frozen.

Things don't go as expected and they wake up from the frozen capsule 20 years later instead of 24 hours.

In order to survive the side effects of their cryogenic sleep, they must follow a set of restrictions to maintain their body temperature at 31.5 °C (max.

Won Jin-ah and Yoon Se-ah have previously starred together in Rain or Shine (2017).