Jung Ki-Hoon (Koo Gyo-Hwan) used to search for strange supernatural phenomena as an archaeologist. An unexpected case caused his life to change. He now publishes occult magazine Monthly Strange Story and runs YouTube channel Monthly Strange Story. Because of his ex-wife Lee Soo-Jin (Shin Hyun-Bin), he goes to Jinyang County and researches “Gwibul” (a Buddhist statue that is possessed by an evil spirt). There, he faces an incredibly bizarre & fearful phenomena.
Lee Soo-Jin used to decipher letters and symbols as an archaeologist. She was excellent at her work. But, her only child died and then she went to Jinyang County. There, she experiences a mysterious phenomena. She searches for answers behind the mysterious phenomena.
Meanwhile, the people of Jinyang County, including police substation chief Han Seok-Hee (Kim Ji-Young), her son Han Do-Kyung (Nam Da-Reum), governor Kwon Jong-Soo (Park Ho-San), and trouble maker Kwak Yong-Joo (Kwak Dong-Yeon) face an incredibly bizarre phenomena.