In this gothic Victorian-Era, including those with supernatural abilities, and automatons lingering around with the Empire, setting law and order. But when the plauge doctor, Gunn, the Plague Doctor, is a young man who's family was killed by this Empire, he becomes a villain, but was easily defeated due to the fact that he wasn't born with any natural magic, but he studied curses and acid and poison, and killed many.

But after getting beheaded in front of the entire city, minutes later, he is reborn, but with natural curse, blood, a noir-like system, and poison abilities. And as he revives without a clue how, he yearns to make the strongest leader and member of the Empire suffer, and kill every member of it.