It is the near future. Astronaut Sam Bell (Sam Rockwell) is living on the far side of the moon, completing a three-year contract with Lunar Industries to mine Earth's primary source of energy, Helium-3. It is a lonely job, made harder by a broken satellite that allows no live communications home. Taped messages are all Sam can send and receive. Thankfully, his time on the moon is nearly over, and Sam will be reunited with his wife, Tess, and their three-year-old daughter, Eve, in only a few short weeks.