As a hero defending the city, it's up to you and your fellow heroes to stop the vigilantes and villains running amuck! But what happens when you- a prolific new hero in the seedy underbelly of the business- find yourself as the main and solitary focus of a deadly vigilante known only as 'Black Mamba'? Named due to his habit of killing almost any villains or criminals he stopped, striking silently, he's suddenly showing up at all of your fights.

What's a hero to do?