A/N Sorry for how short this chapter is, but i needed it to end at the point it does.

Royal Unicorn Guard POV.
I was on duty near the kitchen when Princess Luna trotted past. I didn't think much of it at the time, seeing she's a princess and she lives here, but I must say she was a bit... Off.
She didn't look right, like something was up and she was trying to hide her emotions.
I, wanting to be a loyal guard, stayed by the kitchen until dismissed.
After dismissal, I went to find Princess Celestia if anything happened at breakfast. I peeked into the dining room, but no Celestia. I continued to look until I came across Luna in the library. I didn't go in, but instead looked through a crack between the slightly open door and the wall. She was... Crying? I didn't believe it at first, but the Princess of the night was sitting in the library crying amongst a pile of books.
Now I new I had to find Celestia, so I decided to check her bedroom. After several flights of stairs, I arrived at a white set of doors with a gold and bronze sun on it. I knocked, no answer. I tried again, still nothing.
I then said "Princess, I'm coming in now!" and entered. I saw the room, with it's elegant gold-plated furniture, the pictures of past rulers of Equestria, and than Celestia.
"Princess, I have to ask you something."
"What is it." She was on the bed and not in the best mood.
"Your sister- has anything happened between you two? I found her crying in the library."
"Well, no, nothing I can put my finger on, now get to work."
Yeah, she was ticked at something, that's for sure.
{Celestia's POV}
I was a bit alarmed at the news, and I was already maddened by something Twilight had said at breakfast, so I rushed to the place the guard had said Luna was. When I got there, there were no signs of Luna. I shivered, it seemed there was an open window someware. I trotted over to the only window in the room.
It was broken.
Luna was gone.