About the title
The story tells of the chilling world of black-clad nuns who practice exorcism. Strong-willed and unshakably faithful, sisters Junia and Michaela take on the mission of saving a young boy from evil forces. Drawn into the tragedy of Hee-jun, allegedly possessed by a powerful evil spirit, the two women try together to withstand the chaos and danger lurking at every turn. But besides the women and the possessed boy, the story also includes others who don't believe in the occult nature of his affliction — not even all the Catholic priests are convinced that Hee-jun's condition is the devil's doing.