Soma takes place in an underwater research facility known as PATHOS-II. While the Station itself is now in a state of disrepair, the player quickly establishes that PATHOS-II was a group of stations scattered around the North Atlantic ocean originally functioning as a "space gun", or more precisely, a mass driver, an installation designed to send objects into space without the hassle of building expensive rockets. Unexpectedly, the crew of PATHOS-II became the last people to exist on Earth after a comet impact caused a major extinction event. There, the last humans survive on a day-to-day basis, attempting to fight the negative effects of their collective isolation. During this period, the machines in PATHOS-II begin to develop human characteristics and a consciousness.
