Space Station 76 is a refueling satellite near an alternate-reality Earth, circa 1976. Jessica arrives to serve as the station's new first mate. While she narrates a piece about how she likes the predictability of asteroids, some placidly drifting asteroids are shown colliding in chain-reaction fashion. While at first the station appears normal and the people friendly, Jessica soon discovers that the people on board have issues due to the isolation and stress of being cooped up with one another...