In a world where there were Heroes, Villains and Vigilantes, stood TommyInnit and his sister, April. The rules are simple, if you were a hero, you are not allowed to have ANY connections with villains and vigilantes, whether it's friendship, or something more. For Villains and Vigilantes, it's the same.
TommyInnit and April have already been through many hardships, losing their parents to a fire and being separated from their two older brothers, having the worst time in their adoption center or being adopted. Through all this, they decide to choose a dangerous and illegal path - being a vigilante. And now, everything was going well, but their fate was much, much more ILLEGAL, DANGEROUS, even FORBIDDEN. Will they lose hope? Will they fight for freedom and peace? Or... will it DESTROY them completely?
"Ah shit, I missed the real target."
Wilbur works for an agency that kills people, particularly rich people. But while on a mission when he almost dies, he is saved by someone with a very accurate shot. He meets another assasin from a different agency, something he's never knew of before. Of course seeing the skill and attractiveness he can't really just let him go...
Quackity works for a different agency that seeks to be better than all the rest, that means more missions and more training, most importantly more money. It takes a very long time to get up in the ranks and he has spent much time there. But when tasked to kill a particular dangerous assasin he realizes he might not be a threat at all, until he gets captured that is.