Due to Anon-A-Miss, Sunset Shimmer flees from CHS, but when she ends up being stranded, she seemingly finds salvation when she boards a train at a mysterious station in the woods. Now, along with new friends and fellow passengers from across the Multi-verse, she travels along the train, where the possibilities are as infinite as the train itself, trying to find a way to get off the train and return home, while discovering things about herself she never knew.

Big Multi-crossover.