A series of thievery and vandalism ruins the peaceful life in Ponyville. Fighting with dragons and weird monsters is one thing, but the ponies don't know how to deal with crimes like these, especially because they have no clue who would be able to steal from them, when making an honest living and becoming friends with the citizens would be so much better for everyone. Pinkie Pie can't stand that her friends can't smile happily because of the worry that their homes might bet broken into next. She just has to do something!