The life of Rainbowshine gets rudely interrupted when a letter delivered to the wrong pony gives her knowledge of a secret organization called the Butterfly Brigade, and their plan to gain control of Cloudsdale with terror and fear.

After an accident leaves her grounded, she searches for somepony that can help her dechypher the odd documents she recieved. This becomes the start of a dangerous spy game against the leader of the brigade. With the hearts and minds of Cloudsdale at stake, and facing an enemy guided by the force of chaos itself, it is easy to go too far...