Dosojin - Story of the curse

The hero was cursed to travel forever. If he stays in a settlement for more than three days, then the city will be engulfed by a horde of skeletons, which will destroy everything in its path until it reaches him.  There was a rumor that the hero could get rid of the curse. For this, he needs to overcome a difficult path to the castle to meet its owner, who, if you believe the gossip, once also carried the same curse, but was able to get rid of it. The hero must meet him to find out how to finally become free and return home.