Christmas is Derpy’s favorite time of year. That's why she planned to make this Christmas the best Christmas ever for the Doctor and Dinky. However, a certain pink pony had other plans.
Derpy loves flying through the sky. It’s what she lives for. There is nothing in the world that she would rather do more. The sky is her domain and there is nothing that will keep her from it.
When a portable teleportation device is created. Twilight soon discovers that she's doomed her friends to death in three days! (Based on Expiration Date)