Both The Priests and Dark Nuns revolve around the theme of exorcism and the battle against evil forces. In The Priests, Father Kim and Deacon Choi investigate whether a young girl named Young-shin is possessed by a demon or influenced by human forces. Meanwhile, in Dark Nuns, two nuns, including Nun Junia, strive to save a boy named Hee Joon from an evil spirit, with the people around him also struggling to help. Both stories highlight the intense struggle to save the possessed individuals from dark, supernatural forces.
