Mere weeks from giving birth, Rarity invites Rainbow Dash and Fluttershy to stay with her while her husband is away on business. In the months since they last saw each other, Rainbow had only grown more bitter over Rarity's sudden leave from Ponyville. A few misplaced words were all it took for everything to fall apart at the worst possible moment, and nopony was quite prepared for what happened next.

** Set almost three years after Twilight's disappearance in A Decade Lost (or, just over seven years before Twilight's reappearance). Reading A Decade Lost beforehand is not necessary, but should clear up any questions you have.