Midoriya inherits the superpower of the world's greatest hero, but greatness won't come easy. 
What would the world be like if 80 percent of the population manifested superpowers called "Quirks"? Heroes and villains would be battling it out everywhere! Being a hero would mean learning to use your power, but where would you go to study? The Hero Academy of course! But what would you do if you were one of the 20 percent who were born Quirkless? 
The raid on the Hassaikai gang is in full swing, and the heroes plunge into the darkness toward their ultimate confrontation. Lemillion engages Overhaul in an attempt to rescue Eri, and the battle reaches a new level of intensity. Midoriya is desperate to help his mentor, but what fate has Nighteye foreseen for them all in this clash? And does the key to Midoriya's survival lie in Eri herself?