Fresh off the battle against Tirek, Equestria has been very quiet, but that's all about to change when portals constructed of pure chaos start showing up all over Equestria. A cast of colourful anthropomorphic creatures begin appearing from the portals, and will need the help of The Mane 6 to get back home.

After Rainbows Birthiversary Cheese walks off into the sunset but Pinkie doesn't want to see him leave so she chases after him.

Cover Art by http://fillyblue.deviantart.com/