As long as there is good in the world,
there will be evil. After all, how can good and evil be defined without humankind's concepts of them?

More importantly, would they even have come to exist, had it not been for that fateful choice in Eden?

The infamous Enigma has built itself on these questions, capitalizing on the fickleness of human morality.

Enigma is a mystery to most heroes. Just as the group's name suggests, it is an enigma. It has a sprawling network of members, all of them as unassuming as the next.

Madarame Katsuo is one such member, tasked with bringing down U.A. — and eventually, the rest of the hero world — from the inside-out.

Although Katsuo accepted the task without question, it is his admittance to UA and a certain fellow student that forces him to reevaluate his morality and the goal he was sent there to accomplish...