Priest Season 1 Episode 15

Woo Joo is sick again with an unknown cause. It is revealed that the demon that once haunted him before visited him in his dreams. Father Moon suspects it is the demon’s breath that has infected Woo Joo. Soon after Woo Joo’s arrival, many people around him are getting sick and having the same symptoms as Woo Joo. (Source: Viu)