As Rainbow Dash trains excessively for the Equestrian Grand Prix, she receives a letter from Applejack to help her look for Applebloom who has gone missing. Rainbow decides to first take part in the competition then head over to Sweet Apple Aces. As it turns out the other ponies eventually found Applebloom, however she was dead. Rainbow Dash blames herself for the tragedy that happened that day and the guilt begins to eat her away. Rainbow Dash can't take it anymore and decides to go see Twilight for a spell that might help her. The spell requires Dash to fall asleep, but when she does she wakes up in Cloudsdale. This is not the same city as before though, it is abandoned and has strange creatures lurking about. With mysterious notes located around, Rainbow Dash's only hope is to follow what the clues say and hope for the best.