Princess Luna's crown jewels have been stolen in broad daylight! The innate power imbued in those royal vestments could be very dangerous in the wrong hooves. They must be retrieved and the thieves apprehended with the utmost discretion. Detective Clover Clues of the Maretropolitan Police Department might have a clue, but he will have to make a stellar case to the Celestial Bureau of Investigations. Why else would Celestia's finest let a City detective pursue an international criminal all the way to Neighpon?