Oasis is hired to investigate the preponderance of El. Why do meteors continue to fall long after the shower was supposed to have ended? In search of answers, they travel to the workshop of Mise Altoise, the builder of Minette and Agnes's teacher. Despite signs of her recent presence, Altworth is nowhere to be found. After considerable sleuthing, Oasis finds a letter addressed to Agnes from Altworth that says she has gone in search of an artifact. They have no time to reflect on the meaning of this, as the group is immediately attacked by a mysterious duo trying to take Minette's core. Agnes recognizes Avril and her own older brother Aberdeen, but they vanish before she can call them to account. Ritos and Salsa make a cameo.