The world has been hit by a fascinating and terrifying occurrence at the same time, in around 1350 a couple of years after the plague started to sprawl over europe some terrafying modifications started to occur in some peoples immune system.
People started to not be conquered by sickness but conquering, them manipulating them as if it's some kind of weapon. Some years after that the world was in chaos, the people of some countries even started rebelions and took over their respective governments.
People called this event as "The Surge", After that it was made a world government by the most powerfull countries still standing, those who had this type of mutation on their body started beying chased by this world government, but not just the criminals but the inocent, the chilldren and the woman too .
After this occurence, the world changed for the worst, where death follows you around, people who lost everything, family, wealth, friends and sanity are now lurking around meaninglessly. A boy was born in mists of this chaos, "Guto Mörker" the one who carrys the blessing and the darkness of the world.