Twilight decides to go out for a friendly night of drinking with her two friends, Pinkie Pie and Fluttershy, to relieve the stress of planning her brother's wedding and defending Canterlot against the changeling invasion, but not all is as it seems.
A letter arrives in the middle of the night, informing the unicorn that one of her two friends has been replaced by a changeling.
Twilight and her two friends go out drinking, but one of them is not what they seem...
Fluttershy, with the help of Twilight, plans to tell her friends that she's a changeling, but when Fluttershy and Twilight are teleported to a mysterious forest, it seems the two won't be able to find their way home.