A pastor and a detective, driven by their beliefs, pursue a missing person case, with the pastor seeking retribution after a divine revelation identifies the culprit who abducted his son.
A young boy Hee-Joon is possessed by an evil spirit. Nun Yunia tries to save him, assisted by Nun Mikaela. Priest Paul attempts medical treatment, while Priest Andrew performs an exorcism to rid Hee-Joon of the spirit.