In need of fuel for your ship after Ruin's sudden destruction of Earth, you equip an APG (Air Pocket Generator) and beam yourself down to the nearest planet's moon to find Erchius fuel, unaware of the lingering, ghastly creature within the moon's core. One that doesn't wish to part with its belongings.

Note: There will be two different paths, one where the ghost is straight up trying to kill you, the other being the Starpounds version of the ghost, where lingering around the ghost causes some rather expansive side effects, as does touching the liquid fuel itself. Starpounds ghost will be should be less life threatening, but more invasive.