While on weather duty, Rainbow Dash's weather squad is separated by a violent storm. Facing high winds and low temperatures, she is forced to take refuge in a nearby cave. After staying in the cave for a while, Rainbow begins to notice some kind of presence that makes her feel beckoned deeper into the cave. Little does Rainbow know that her decision to follow the sensation was the first step in a long and mysterious journey, for what she finds inside will change her view of the world forever.