When Lucy meets an arrogant treasure hunter, the quiet life she's built for herself is shattered. Adventure, betrayal and love now await her as she confronts the dark truths of the world, and of her past, alongside Natsu—whose own mysterious past threatens to come between them. How far will Natsu go to keep a promise? How far will Lucy go to break it? -NaLu (Gruvia, Gajevy, Jerza)