After a late start, Spike, Fluttershy, and Pinkie Pie are left behind as Applejack, Twilight, Rarity, and Rainbow Dash catch the train to Canterlot. Pinkie suggests to go into the library and take Twilight's spare chariot in the lab. When the three uncover the peculiar looking chariot, and find a weird drink next to it. After convincing Fluttershy to drink it, the three fly in the chariot, only for Fluttershy to go unbelievably fast. The next thing they know, they're somewhere else, somewhere cold, primitive, oddly familar. Can these three get...well, back to the future without messing up history?

Pinkie Pie, "Hey Fluttershy, you gotta back this thing up, we don't have enough road to get to 88."

Fluttershy, "Roads?" She stopped to think for a moment. "I'm a pegasus, I've never needed roads."