Swordsman of the Damned

The long war that put an end to the dispute between the vampires and humans has created an even more haunting threat, hybrids referred to as the "marked ones", setting all four regions of the entire post-apocalyptic nation of Haceron in complete turmoil.
Kais, believed to be the only living swordsman,with no knowledge of the rampant crimes happening around him, is left to fend for himself in a city bound by social hierarchy and oppression. Little does he know that he might be the key to finding out more about the concealed history of the hybrids unbeknownst to everyone else...but how does one lone swordsman be of any help with his memory completely wiped?