In the not-too-distant future, astronaut Sam Bell (Sam Rockwell) has lived on the moon far away from the earth for nearly 3 years, and is about to complete a 3-year contract with Moon Heavy Industries. Employment contract, and what he needs to do is to mine the original energy in the lunar soil-helium-3 on the surface of the moon.
For Sam, what he was doing was a very lonely job, because the artificial satellite used for communication had been broken for a long time, making it impossible for him to get in touch with anyone. Too quiet environment would only make time more difficult, and Repeatedly playing the sound information on the tape became Sam's only comfort in this lonely world.
Thankfully, the time for Sam to leave the moon and return home is getting closer, and in just a few weeks, he will be able to live with his wife Tess (Dominic McElligott) and daughter Eve (Ka Ja Scodeario) reunited. In the end, Sam knew that he was bound to leave the isolated and lonely world of "Saran"-it was the base built by humans on the moon, and it was the habitat that Sam called home for the past three years, and he finally I can talk to people other than "Curry" (voiced by Kevin Spacey). "Curry" is a smart computer in the base.
However, at this moment, Sam’s health suddenly began to deteriorate. The constant headache accompanied by hallucinations made him unable to concentrate. As a result, an accident that almost killed him was caused. He was driving. The lunar rover traveled on the orbit that it must pass every day, and there was a car accident. When Sam returned to the base awaiting recovery, he had no memory of how he came back here. Sam suddenly discovered that there were humans other than him in the base, who was a younger and more manic self. He claimed that he had just signed a three-year work contract to come to the moon for mining work.
The appearance of this early cloned version of himself has really restricted Sam’s free life and work conditions to a large extent, but it also means that there is an extra "logistics" around him to help him organize the base together. Let everything return to an orderly right track. Sam raced against the clock to use the limited time left to try to sort out what happened and the company's ulterior secrets.
