A week after her coronation, Princess Twilight is killing time in between her lessons at the castle with Princess Celestia by experimenting with high-level magic spells. After a failed experiment, Twilight seems...different. But that's the least of everypony's problems. What started as a miscast spell snowballs into a series of events that threatens to plunge all creation into everlasting madness. Well, it has been an entire week. I suppose Equestria's due for another disaster.