The Elegant Diamond. A name that everpony knew. Seductive, cunning and agile. The famous costumed rogue evaded the grasp of the royal guard again and again. Her small, but talent gang allowing them to perform the most impossible of heists, stealing from the most secured vaults in the lands and sharing their riches with the poor.

Now however, the Royal Guard have seized an opportunity to get one of their own into their ranks. And not just any normal guard, but one of the best and brightest of them all. Now, they are tasked with infiltrating the gang and bringing them to justice from within the inside.

But in order to bring them to justice, one must first know what justice is.