It's a big day for Fluttershy; a day of memories, dreams, pain and peace. But when Cutie Mark Crusaders bring her moment of calm to a sudden and terrifying end, she realises that the the three little fillies' adventures are getting a little out of control. To help them, to keep them safe, Fluttershy decides she needs to tell the story of how she met her strangest, pinkest friend - and confront some old nightmares in the process.