"I stood before the doors to Princess Celestia’s private chambers, just as I had so many times before, and waited. I’ve always been a nervous mare before our meetings, wondering if what I had done measured up to her expectations. But I had never before entered those rooms with the blood of another being on my hooves. I swallowed, dreading what I would discover behind those doors."

Twilight faces more than she bargained for when a resort island turns out very different from her expectations, and she must make a decision that will forever change how she sees herself.