Whatever that thing that had yelled at her yesterday was, it wasn't Rainbow Dash. Rainbow Dash was actually a bit of a book worm, and never was late on her library books. Ever. Sure she wasn't the greatest conversationalist, but she was reliable. Rainbow Dash was 3 days late on her books. It was so unlike Rainbow Dash to not Return her books, or even to just come see her, everyday.

When Rainbow Dash had been grounded, she asked for several books. She said that if she didn't come back, to go right over to her house and get them. One other thing worried her.

"Twilight, can you promise me something?" Rainbow Dash whispered.

"Yes?"

"If... If I don't come back from this... .... There is an envelope in my house... I want you to go up there and find it." Dash was crying. "The books will be on my couch like last time."

The sheer desperation in Dash's eyes had made her instantly want to go up into that house and read that letter, but she resisted.

Then there was that vision that Discord had shown her.

Rainbow Dash lay in front of the statue of Discord, her fur slick with sweat, her eyes full of tears.

"Please help me... Please..." She was begging Discord.

The statue cracked open, and Rainbow Dash Died.

"I'll help you... To Cause Chaos!" And Discord Laughed.

Twilight was inside of Rainbow Dash's house before she knew it. It was peaceful in here, everything was a level shade of grey. Here  and there were empty bookshelves and indeed there was a letter on the table. It seemed wrong in here, like something horrible had happened here. She carried the envelope down into her library and began reading it. By the end she was crying.

And she knew what she had to do.