Chances are, if you've been living in Equestria for a while, you haven't heard of a group of soldiers known as Celestia's Secret Service. These guys basically help prevent each town in Equestria from being destroyed. There's an even lesser of a chance that you've heard of Squad Zulu, a group deemed "too useless and incapable to even be apart of this secret organization" (quoted from Squad Alpha).

However, when the princesses are kidnapped without a trace and the other squads of the CSS are nowhere to be found, it's up to this group of ponies—well, a pony, griffon, and a changeling—to find them and bring justice to Equestria.

Though it would be easier if there weren't a certain group of ponies breathing down their necks.