When her 'brother's wedding day comes, she thinks of nothing but that it will be a drag. But when Twilight discovers that her mother is undercover, Twilight is happy, knowing that maybe the wedding won't be as bad as she expected.

Applejack couldn't help but notice that Twilight has been acting weird all the time. Will Twilight be able to keep up her cover or will everypony discover the truth before she and her mother can begin their plan to attack Canterlot?