From the shadows, the tyrant King Sombra and Queen Chrysalis return once more, leading their Changelings against all of Equestria. Twilight and her friends must find a way to bring down the dark lord in a race against time.

Twilight develops feelings for a new stallion, while Rainbow Dash searches for Wonderbolt tickets.

Rainbow Dash must go with Dr.Whooves throughout her past to save the future Equestria.