Another world lurks just beyond the comfortable facade we've all come to know. An ancient world of superstition and the supernatural encroaches on the boundaries of the mundane, pushing to get in, desperate to reap the harvest of such pitifully easy prey. Vampires, werewolves, ghouls, zombies, and more horrifying things lurk in the night.
When the sun sets, the world is theirs for the taking. As a matter of necessity, there are certain groups aware of these threats, and tasked with the solemn duty of defending mankind.
On one side of the board lies the Hellsing Organisation, known formally as Her Majesty's Royal Order of Protestant Knights. It is their duty to stamp out evil in the name of Queen and Country, and to defend Protestant interests wherever possible and necessary. Led by Sir Integra Wingates Hellsing, a woman of considerable determination and strength, they are a force to be reckoned with.
On the other side of the board lies the Catholic Church and their numerous divisions. Among these, Section XIII, "Iscariot," carries duties not unlike those of the Hellsing Organisation. Theirs is to seek out evil, heresy, and threats to their innocent Christians. They are to stamp out these threats with extreme prejudice, doing whatever is necessary for the greater good.
Often these two organisations clash in the course of their duties, and over time they've settled into an uneasy alliance, dividing up their territories for the sake of avoiding an all-out war against one another. For hundreds of years this has worked out reasonably well. The territories of Europe have been safe from the threat of the supernatural.
In the shadows, unbeknownst to either side, stirs the Millenium Order. Sowing chaos, violence, and the occasional plague of artificial ghouls around Europe and the world, their motives and very existence are shrouded in mystery. They seem to be two steps ahead of either Hellsing or Iscariot.
Left unchecked, their machinations may well bring humanity to its knees.