An actual exorcist, Hong Ji A, gets rid of unrested spirits to sell houses at original market prices. On the other hand, Oh In Bum is a fake exorcist who calls himself a doctor of the paranormal to scam people. Two totally different people live their lives as per usual until the day they serendipitously run into each other.

Lee Eun Hye, the director of Britium Art Museum, is having issues regarding an unrested spirit haunting her museum. As soon as Oh In Bum hears the news, he comes up with a plan to scam Lee Eun Hye. But it does not turn out well after running into Hong Ji A again in the museum. Ji A keeps trying to persuade In Bum to work as her psychic for just one case, but he keeps refusing. Despite their differences, they keep meeting on a crossroad which they do not know where it leads.

Thinking that the death of Ji A’s mother has something to do with his uncle’s death, In Bum determines to work with Ji A. Despite her refusal to continue working with a fraud, Secretary Joo persuades Ji A because he was the strongest psychic they have ever seen. The two eventually start their fragile partnership and begin working cases.

Ji A closes the Britium case with the help of In Bum. However, he goes through side effects from the possession of Byung Ho’s spirit. Knowing everything that Byung Ho had gone through, In Bum cannot resist the pain and sorrow that Byung Ho had felt. Everything he tries to deal with the side effects was meaningless, but he soon comes up with another plan.

Ji A runs into an unrested spirit that is haunting the chairman of Dohak Construction. She straight away recognizes him as he is related to her mother’s last exorcism. Meanwhile, Ji A and In Bum visit Green Vila for another case, and the spirit doesn’t even know that she was dead after being scammed. In Bum and Ji Chul secretly look for President Hwang, and Ji A meets his sister, Hwang Ji Yeon.

Ji A gets reminded of what happened 20 years ago, but this time with a boy whose face she can't see. Later, Ji A and In Bum head back to the sauna to perform the exorcism. They successfully get rid of the restless spirit, and after, In Bum's conscience tells him he needs to do something about the murder.

Chairman Do gets a taste of his sinful past and does a background check on Daebak Realty. Ji A wants to know more about her mother's case that happened 20 years ago and meets with Mr. Jung, the man Secretary Joo met and found out about Oh In Bum. Meanwhile, In Bum sees Secretary Joo at Dohak Construction and confronts her about it. Later, Daebak Realty takes on another haunted house case.

Ji A blatantly blames In Bum for the missing 1979 Record of Exorcism while he has to deal with his van getting robbed clean. Later, a new client comes asking for help. Their late daughter Eun Byeol seems to be causing a ruckus within their apartment amid a social clash between the apartment residents. Ji A and In Bum scout the apartment complex and confirm that it is indeed a child's spirit.

After finding out that In Bum and his uncle were the cause of her mother's death, Ji A tells In Bum to get lost and never return. In Bum leaves, but unfortunately, finds shocking proof that his uncle was part of the Yongnam village fire. Meanwhile, Ji Chul meets his girlfriend for the first time, who happens to be encountering a vengeful spirit. He recommends her to Daebak Realty for help.

Soo Jung asks Ji A for her help to rectify her guilt after finding out Hyun Ju died trying to help her. With the cameras recording, Soo Jung sets herself up as bait to lure Ma Kwang Tae to her room. He can't resist and takes the bait. Meanwhile, Do Hak Sung loses his patience with Daebak Realty and sends in his men once again.

Ji A and In Bum escape from the cold storage facility, minutes away from hypothermia. However, Ms. Ju sustains serious injuries after meeting with Do Hak Sung. Ji A can't comprehend how her mother saved her life when she can't be outside Daebak Realty. To find the truth, Ji A puts up Daebak Realty on a silver platter for Do Hak Sung.

After a hectic exorcism, Ji A manages to set Oh Sung Sik's spirit free and saves In Bum's life from Do Hak Sung. Although the exorcism was a success, the memories absorbed by In Bum don't have any answers to Ji A's quest of setting her mother free. Meanwhile, In Bum visits his grandmother to share the news of her son not committing suicide.

Ji A wakes up devastated after learning the truth about what happened 20 years ago that caused her to lose her mother. Although Secretary Ju tries to explain why she hid the facts from her, Ji A banishes her from her life. Meanwhile, In Bum also learns the truth from Secretary Ju, and in return, he tells her what she meant to Ji A.

Ji A realizes that it's her that's holding her mother back from leaving. She closes the door to her room and determines to vanish for her mother's sake. In Bum overhears her, and since Changhwa Restaurant closed its doors after sending off their late son, he convinces Ji A to let him and Ji Chul stay with her until they find a place to stay. Meanwhile, Ji Chul meets with Tae Jin's minion to buy In Bum's uncle's memorandum.

Do Hak Sung gets released from police custody and makes his way to Scruffy. However, it doesn't take long for Ji A and In Bum to find the secret ledger containing Dohak Construction's corruption, putting him back on the wanted list. Meanwhile, from the disaster, an egg ghost appears, taking the lives of the survivors.

Ji Chul and Secretary Ju arrive just in time to scare off Do Hak Sung. With a bag full of money, he runs away. However, he bumps into the wrong person and plummets to his death. While In Bum gets taken to the hospital, Do Hak Sung's unrested spirit enters his body. He walks toward Daebak Realty, where Ji A awaits to keep her promise with In Bum.