This school isn't just for learning anymore. Freshman Rainbow Dash learns of a dark rivalry between two gangs in the school that might bring out the mafia in her.

Sherlock Hooves and her trusty partner Professor Turner have the biggest case in Equestria that will take the entire year just to get half way but they need it done in a week before The Celestial Lining Celebration.

It's the start of summer and the kids have to do a History Project.The Cutie Mark Crusaders have sights set on getting cutie marks for history but they have another way for researching as Sweetie Belle "accidentally" takes the Crusaders through time.