After stumbling into a mysterious doctor from a company called BioQuirk, the man takes a sudden interest in Izuku and his quirk. Between the streak of people vanishing and the sudden research advances from this strange new company, he's sure BioQuirk is hiding something. In his dig for the truth, Izuku quickly finds that all answers must come at a cost.

During another internship with Gran Torino, the two are called to help during a hurricane. Midoriya gets thrown downstream and finds himself at The Oscine House, a private orphanage in a rural part of Japan. During his stay he notices the strange behavior of the home's Director. What could his intentions be, and who are the golden ones the kids are talking about?

What begins as an exciting summer event quickly spirals into an unwanted quest for Natsu and his crew. With Grey on the brink of losing his magic and being trapped in the kingdom of Stardell for good, will Natsu and the others be able to get to him before he's out of their grasp forever?