After Trixie's defeat and the confiscation of the Alicorn Amulet, Twilight Sparkle decides to research some of the spells she had seen the showmare cast. Unable to find most of them due to the fact that they required obscene amounts of power, she does manage to find one that might work for her. A spell to reverse aging. Unfortunately, an interruption by her friends causes the spell to go haywire and now Twilight has to deal with being mother to her five best friends.