This is a ten minute prologue for the phoenix priestess fairy tail movie. It's a pretty good prologue and greatly expands an important character in the movie that you otherwise know too little about. The best moment to watch this prologue is probably 3 minutes after the start of the movie since that way it's chronological. There is no huge story, it's mainly just a snapshot of the life of a character so you get to know them better. It also gives more information about the origin of a side character that helps you understand the movie. The animation and sound are similar or the sameas the main anime/movie.