During an important diplomatic mission, Ocellus is stranded in a faraway land, a land in a desperate need of help. Away from friends and family, she has to prove herself to be a true Student of Friendship.
Not long after Thorax rebels and the changelings turn on Chrysalis, he must now confront several changelings that refuse to transform, including his brother Pharynx.
Stories about monsters disguised as treasure chests were thought to be no more than legends. When Sunburst finds the last one in existence, the Changelings come to him with a demand: to kill it and send the species to extinction.
After being left behind in the badlands after her expedition is attacked by a dangerous monster, Twilight Sparkle must survive a hostile, alien environment. Lucky for her, she has some help from one of the natives: A curious changeling named Thorax.
During Equestria's annual royal summit, newly-met Shining Armor and Pharynx discover they have a fair bit in common, including a passion for homeland security, and an extremely dorky little brother/sister.