It appears to be the mission of their dreams. Princess Twilight and Applejack, alone together, are to settle an issue in the buffalo lands.
But the mission is easy and Applejack and Twilight enjoy the time they spent together.
However, something happens on the trip home to change their lives.
Applejack and Twilight have to deal with their feelings, survival and life and death.

This story has religious overtones.
Just like most fanfic, it is a ‘what if’ and a parallel universe. As such it is a possible outcome if circumstances were different.