Princess Celestia wakes up in a ruin of the Canterlot Palace during a downpour that never seems to end. Finding that Canterlot has met the same fate, she wanders, unable to escape.

Rarity normally thinks dreams are nothing to take seriously, that they are just random ideas flitting around in sleeping ponies' heads. One night, however, she has a vivid dream that she cannot forget and writes a letter about it to Fluttershy. Can dreams be meaningful? If so, what does this dream mean?