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After losing his father at a young age in a terrible accident, Yong-hu (Park Seo-jun) abandons his Christian faith and chooses to only believe in himself. Now as an adult, Yong-hu is a champion fighter and has everything he has ever wanted, that is until a mysterious wound appears in the palm of his hand. He solicits help from a local priest Father Ahn (Ahn Sung-ki), hoping the priest can help relieve him of the painful markings only to find himself in the middle of a dangerous fight against otherworldly evil forces seeking to wreak havoc on the human world.