It was the perfect plan. Send a message through time, warn yourself about your own self-destruction, and throw in a little chaos magic to break that whole nasty 'time paradox' thing. For Sunset Shimmer, it seemed like the perfect way to put her life back on track.

And it did.

But now, things are starting to go sideways, starting with the disembodied voice in Twilight Sparkle's head. The disembodied voice that seems to know just a hair too much about time travel. The disembodied voice that keeps goading her to dig up things she shouldn't.

The disembodied voice that makes a very compelling argument for vengeance.