Curse of the Quincunx

During the Middle Ages, and after two hundred and fifty years of inbreeding, this geographically isolated community of genetically diseased killers is all but destroyed by an earthquake. Its few survivors scatter to the four winds and resettle afar.
Now, a mad man tries to resurrect their lineage, hoping to recreate an army of mercenaries from what remains of their genetically noxious descendants.
Waiting for them are the agents of World Interconnect (WI-7), who attempt to stifle this deadly march of evil. WI-7s quest is international; its failure would be catastrophic.