Twilight and Fluttershy have been friends ever since the defeat of Nightmare Moon. Not long after Twilight's ascension, Fluttershy decides she wants more.
After sending Twilight to Ponyville, Princess Celestia demands letters from her but when Twilight starts to complain, Celestia becomes unhappy and replies to her letters in her own way.
Twilight has just been crowned as a princess but is unsure of what her role will be. On top of that, she is hiding a secret that she is scared to admit to anypony, even the one that it would affect the most.
It is just another day in America's most dangerous city and Marcus is doing his best to simply survive. On a day that he thought might be his last, events unfolded that caused him to be transported to a strage place he had never seen before.
Since becoming marefriends with Twilight, Princess Luna has been more cheerful, more cheerful than she has ever been. This brings about suspicion from Celestia and causes her to want to figure out why her sister is suddenly so happy.
Luna lost a long standing bet to Celestia and now she must pay up. Twilight is not thrilled and thinks that giving Celestia a stern lecture will save her marefriend from a terrible fate.
While Starlight Glimmer is in Canterlot for a few days, a couple of ponies from Starlight's past arrive in Ponyville to entertain the locals but after seeing who lives there, they decide to cause problems instead.
Rockhoof has returned to Equestria after a thousand years in Limbo. He's also severely depressed. Princess Luna pays him a visit in his lonely dream to find out what troubles him.
At the age of 20, Twilight Sparkle is still without her mark and since her brother is the captain of the royal guard, he could get Celestia to help her. Once Celestia realizes that she can't help her, she sends her to her protege who possibly can.
Starlight has come of age and is now going to aid Celestia with bigger issues. What she doesn't know is that things will not only change for her, but her friends as well.
When Princess Celestia falls ill, she summons Starlight Glimmer to Canterlot to take over her duties for a few days. Celestia is confident in her protege's abilities but Luna has her doubts.
Twilight Sparkle and Starlight Glimmer are engaged in a time travel battle and no matter what she tries, Twilight just can't get Starlight to stop altering the past. The battle is growing old for Starlight so she decides to end it once and for all.