Convict

There are tens of thousands of sinful souls wandering around the Sin City every day. They look for hosts, help the hosts, and devour the hosts. The seven sins are rampant, polluting the land within the darkness of the city. But in such a city, a group of people in black and white robes wield weapons or carry criminal karma to hunt and execute the guilty souls in the gutter, just to make the city no longer guilty and evil.