After an inexplicable explosion ripped apart the Everfree Forest, the sun that blessed Equestria and its neighboring kingdoms and city-states has evaporated, and Celestia was gone with it. Few remain upon the Earth to ponder if it was mere coincidence, or what was the royal army doing so close to the forest. A unicorn, a griffin, and several uncanny companions begin an epic journey to ask, answer, and cheat the question through will, loyalty, and pure luck: What happened to Equestria?