At Discord's urging, Princess Twilight hops on through the mirror portal to Canterlot High, which had been closed for two millenia. Instead of a school, she finds herself in a cargo bay of a starship. Discord also has popcorn at the ready.
When a Rainbow Dash from another world crash lands near the Badlands Hive, Princess Twilight Sparkle, daughter of Queen Chrysalis, works to find a way to send her home.