Sam Bell (Sam Rockwell) is an employee contracted by the Korean-based company Lunar Industries to extract helium-3 from lunar soil for much-needed power back on Earth. He is stationed for three years at the 'Sarang' lunar base with only a robot named GERTY (voiced by Kevin Spacey) for company; a chronic communications failure limits him to only occasional recorded transmissions to and from Earth, such as a video message from his wife Tess and three-year-old daughter Eve. Two weeks before completing his assignment he begins to hallucinate, briefly seeing a teenage girl on the station. During a routine rover excursion to extract helium from a harvesting machine, he sees the same girl standing on the lunar surface. Distracted, he crashes the rover into the harvester. (Wikipedia)