Rainbow Dash, Rarity, Apple Jack, Fluttershy and Pinkie Pie have begun training young ponies to fight against the humans (who are greedily trying to take over the MLP universe), under the watchful gaze of Twilight Sparkle, who reports back to the princesses on their progress. What will happen when a human teen is captured during one of the battles? Will he be working as a spy for the humans, or will he provide the key to end the violence?