Twilight has been studying under Luna for just over a year now, learning all there is to know about the duties and requirements of the Princess of the Night. On her brake back in Ponyville, Twilight receives a letter from Celestia stating that Luna has been badly injured. Once back in Canterlot with her friends, they learn that dreams all over Equestria are being stolen and corrupted, and are sent to look for the one they think is behind the thefts. But what happens when her friend's happy dreams are stolen and turned into fearful nightmares? Only time, will tell.