The events of this story take place during and right after Firendship is magic parts 1 and 2.
On the eve of the Summer Sun Celebration, three Royal guards fought valiantly to save Princess Celestia from Nightmare Moon. But were struck down by the mare on the moon's magic and were transformed into toddlers. Now as they try to find a way to prove to Celestia that they can still be her royal guards. She tries to teach them that they're foals and keep them from causing trouble.
Editor Superpinkbrony12