Natsu and Happy team up with Lucy and they accept a job that has a strange and seemingly simple request...enter a mansion owned by Duke Everlue and burn a certain book. Is this job really as easy as it seems?

Erza Scarlet returns to the Fairy Tail Guild and asks for the help of Natsu Dragneel, his partner Happy, and Gray Fullbuster on a quest. Lucy Heartfilia tags along with the them as well. Together, the team works to uncover the goals of Dark Guild, Eisenwald, and the nature of the Dark Flute, Lullaby.