Source: Borrowed Grace is a side-fic written by 4HoovesanOunce. It spans twenty-four chapters, chronicling the attempts of a team of space station inhabitants in reaching Equestria some 1,400 years after their ancestor's mission began.
The story follows a society of ponies living on a space station orbiting Equestria's moon. They are unable to move past the field created by the Blue Rainbow or the large amount of debris now orbiting the planet. Unlike other remnant societies, the station inhabitants know what occurred during the apocalypse and regret the follies of their ancestors.
Unbeknownst to most cosmonauts, however, there is an additional cargo the station has hidden for centuries. One that might alter Equestria's history.
It is notable for being told in third person, while most Source stories are first-person narratives.