Nidra is troubled by something and there is only one pony that can help her.

Starburst, daughter of Princess Twilight Sparkle, wishes to become a royal guard. But when a strange pony pops into her life she gets an experience she didn't expect.

When a new pony comes to town, the mane six great her in an unexpected way. They learn of her past and how she became a Hero of Equestria