Starswirl helped Twilight find a library that she has wanted to find since she was a filly. It is known as the Great Library and information that could benefit all of Equestria.After Starswirl helped find the library in a vast desert,she entered the library, alone. Twilight exited now to a new, different landscape, but there is no civilization in sight. Twilight's mission is to explore this new land and find where she's at, so she can find Ponyville to be with her friends.