It was just a normal morning when Luna had her first nightmare in one hundred years. As she laid there in bed, the shock of it all awoke her peaceful sleep. She then began to pace for several hours straight until Celestia came into the room. "What's wrong, little sister?" asks Celestia concerned.
"I had a nightmare, the first one in a hundred years," responds Luna.
"Well, wanna grab Twilight and the three of us can talk about it?" asks Celestia.
"Sure," responds Luna, "I'd like that."
A few minutes later, the three princesses sit down together at the table behind freshly baked pancakes. "So, what's wrong Luna?" asks Twilight quietly.
"I've started having nightmares again after a hundred years," responds Luna, "and it shook me to the core."
"Well, there's got to be a reason," says Celestia as she rubs Luna on the back.
"Yeah, I just wish I knew what that reason was," sighs Luna.
"Well, think about it," says Twilight, "anything that's happened to you lately that could trigger nightmares of this nature?"
"I dunno," responds Luna. "There could be one thing, no, wait."
"Well, what is it, Luna?" asks Twilight concerned. "What were you gonna say?"
"It may be because I became Nightmare Moon a hundred years ago today and I'm still haunted by that," responds Luna.
"That's probably it, but we can get through it together, I promise," sighs Celestia as she embraces her little sister in a hug. The three then get back to enjoying their breakfast. While Celestia and Twilight down their pancakes, Luna only fiddles with hers and ends up eating only two or three out of the ten pancake stack. She then walks off and goes back into her bedroom. Celestia then starts to get up but Twilight stops her.
"Celestia, let me handle this," says Twilight as she flies down the hall to Luna's bedroom.
"You can come in Twilight," sighs Luna. Twilight then enters the bedroom.
"Thanks," responds Twilight as she sits down on the bed next to Luna. "You know Celestia is worried about you? Don't you?"
"Yeah," responds Luna. "I know, but the reason I'm having these nightmares is partly that of her banishing me and the other half, I blame myself for, turning into Nightmare Moon."
"But you still have to forgive your sister for the pain to stop," responds Twilight.
"Yeah, you're right," sighs Luna. "Tell Celestia she's free to come in." Twilight then goes and fetches Celestia and then Celestia goes into Luna's bedroom.
"Hey, sister," says Luna with a smile. "Come on and sit down." Celestia nods and goes and sits down beside her sister. "I have something to admit to you."
"Sure, what is it?" responds Celestia.
"I'm sorry for all those years ago when I turned into Nightmare Moon."
"And I'm sorry for banishing you, I regretted it ever since I did it," responds Celestia. The two then embrace in a hug. The two then go out for an early morning flight, all the while, really enjoying themselves. Luna is glad she's able to confide in her sister and in Twilight, that definitely makes her struggles easier right now.