On Halloween night, Kristen and David are sent to assess an exorcism, but once the pair analyzes the situation, they are at odds while trying to determine whether it is a supernatural demonic possession, or severe mental disease escalated by physical and mental distress. Also, Ben goes on his favorite show, "Demon Hunters," where he debunks their supernatural finds with fellow unbeliever Vanessa.

When Bridget confesses to murder during her exorcism, Monsignor Korecki asks Kristen, David and Ben to investigate if the details match any open cases and if the woman really is possessed by a demon.