Ever since Twilight defeated Tirek, her dreams have been nothing but nightmares. Every night she sees herself loosing to him, she sees herself loosing her friends to him. She knows they can't be real, but each one is more vivid than the last.

After a particularly vivid one wakes her up, she questions whether or not she really did save her friends. She has to find them, to be sure they're okay.

She has to end the nightmares