Thorax and Ember are now in a relationship and want their kingdoms to trust each other. Trying to hear the concerns from both sides, they hold a meeting and invite Princess Twilight for help.

Unfortunately, diamond dogs have plans of capturing the changeling princes and their allies for an unknown revenge scheme. With the help of a regretful diamond dog, Pharynx escapes, and it's up to him and him alone to rescue the others

... well, technically, he's not alone, but how could Fluttershy help him with something this dangerous?