Twilight and Fluttershy have been friends ever since the defeat of Nightmare Moon. Not long after Twilight's ascension, Fluttershy decides she wants more.
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.
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.
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.
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.
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.
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.
Moondancer has always thought highly of Twilight and was devastated when she left without saying good-bye. When Twilight throws a party for Moondancer and rekindles their friendship, Moondancer decides she wants more.
Everypony thinks that Queen Chrysalis escaped capture, but Discord's captured her and holds her prisoner in his home dimension. She's going to get reformed by the Master of Mayhem. Eventually. Maybe. Theoretically.
Mister Lonely Heart is a changeling "Grievance Councelor", who imitates ponies that his clients have problems with. Applejack wants to say a few choice words to a relative. A dead relative.
Mister Lonely Heart is a self-styled "Grievance Counselor", a changeling who mimics ponies that his clients have issues with. When Twilight Sparkle pays him a visit, he finds out how painfully neurotic the Princess of Friendship really is.