Lucy Heartfilia died a long time ago, when she left the estate and joined Fairy Tail. But now that Lucy of Fairy Tail is dead too… How will the family and friends she left behind recover? What's more; how will Natsu deal with Yukino's new Celestial Spirit, whose blonde hair and brown eyes are more than just familiar to him?

Several years after the defeat of Acnologia and Zeref's army, Natsu and Lucy have married and now have a daughter; Alu Dragneel. She has both their magical abilities, but is only half-strong in each of them. When she sets out to repair Aquarius's Key, she learns of an evil plot that threatens to destroy Fairy Tail. Can Alu find the power to save her family and guild?