Equestria's four Princesses expected a relaxing stay at the Crystal Empire. Unfortunately, it is rudely interrupted when Prince Shining Armor is found encased in Changeling slime. Now the empire is on high alert as everypony is searching for the Changeling Spy. However, the Princesses are also partaking in their own investigation. Suspicions are thrown around wildly, from Flash Sentry, to Spike, to. . .Princess Cadence?

This is the second mystery I've written. For my first attempt, check out The Mmmystery of the Headless Horse