It starts after, The Peach Boy; Tale of a Blessed Birth. This story then continues to take place between the different Storyteller stories.
The only Human in Ponyville a.k.a. The Storyteller of Ponyville is visited by Spike, Twilight's number one assistant, after a storytelling festival Spike is feeling pretty low because all the stories about dragons were about the bad kind. It's a good thing he know a few stories about dragon to help lift the little drake's spirits.
Come listen to them.