It started off as a normal day in Ponyville…

…That is until Applejack tells Twilight that Rainbow Dash has gone missing!
At first it starts off as a normal search and rescue until Twilight uncovers one of many secrets that are hidden behind the walls of the mansion!

How did the mansion suddenly appear?
Will Twilight ever find Rainbow Dash?
Or will Twilight become another one of the mansion's secrets?
And just why is Derpy carrying a vacuum cleaner on her back?

Part one of a series I have yet to write or think about.