When one fateful search through the Everfree Forest leads Rarity to a secret library inhabited by the spirit of an ancient alicorn princess, she realises that it may be time to start believing in fairy tales.
To find a missing Princess Luna, Private Lucky Break, batpony soldier of the Night Guard, must breach the gulf of a thousand years of guilt to repair an all-too familiar bond between siblings.
Beset by the pressures of her coming-of-age, Sweetie Belle has secretly been turning to video games for relief from her insecurities. But when her unparalleled gaming talent earns her a cutie mark she never asked for, her life is thrown upside-down.
Princess Luna still feels alone, nineteen years after her return to Equestria. When she finds a friend in an online game, everything seems better. But not all is well in Equestria, and a sinister plot threatens everything that Luna holds dear...