After losing his father at a young age, Yong-hoo grows up to become a martial arts champion fueled by anger and resentment towards the world and God. Despite his physical prowess, he remains emotionally scarred and disconnected from others. His life takes an unexpected turn when he starts developing stigmata-like wounds on his hands, which causes him intense pain and confusion. Seeking answers, Yong-hoo encounters Father Ahn, an exorcist who recognizes the potential divine power within him. Reluctantly, Yong-hoo agrees to help Father Ahn in his mission against demonic forces terrorizing Seoul.

As Yong-hoo and Father Ahn confront increasingly dangerous supernatural entities, Yong-hoo struggles with internal and external battles, questioning his faith and the true purpose of his newfound abilities. Amid fierce exorcisms and chilling encounters, they uncover a deeper conspiracy involving a powerful evil spirit that threatens humanity. Though initially driven by a desire to alleviate his own suffering, Yong-hoo gradually understands the weight of his role in this spiritual war. He must overcome his personal demons to harness the divine fury within him and confront the sinister forces that lurk in the shadows, aiming to restore balance and protect the innocent from unimaginable horrors.