Through flashbacks it is revealed that the same gang of outlaws once raped Aman's lover, so he went after them and brutally killed them while they were imprisoned and defenseless. While running away Aman, himself, was killed, so his mother, a nun, broke her covenant with God and sacrificed herself to save his life, which in turn cursed him for life. The curse makes all the people killed by Aman come back to life, so all the gang members that Aman had killed returned as undead to seek revenge, except for Kansa's son who remained dead. The undead lose their skin after a week, so they remove the skins from the people they kill to use as replacements. The only way the undead can be killed is by destroying their brains.