A 17-year-old girl staggers into a health clinic suffering from what appears to be a meth overdose. She thrashes violently as if she’s possessed. SNAP! The girl breaks her own arm and shouts something in Latin as the doctor, Jeff Dante, tries to save her. The patient dies before anyone knows what’s happened. Megan learns from a nurse that the Latin phrase she uttered means “you’re all going to die.” The room got cold when the girl came in. The nurse says it felt like evil. The dead girl’s name is Rebecca Banks. Megan and Tommy visit with the parents. The father, Caleb, says drugs didn’t kill his daughter. The devil did.

There are imprints of crosses on Rebecca’s body. Ethan and Curtis are freaked because they weren’t there when she was brought in. Megan says the cold air in the morgue brought out the bruises. She brings Kate up to speed on the case since her boss seems to have a lot on her plate with her newfound political aspirations. Tommy has a chat with Rebecca’s sister, Chelsea. The girl defied her father by taking her sick sis to the clinic last week. Chelsea says their family lives under a great sin.

Curtis and Ethan find a tooth in the basement of the victim’s home. It’s a remnant of murders done by a man who killed his three daughters back in 1934. His name is Atticus Aldrich. He’s Caleb’s grandfather. The guy believed his family was possessed by the devil. The Banks clan slips away from surveillance to hide in a cabin in the woods where Chelsea shows signs of possession. A priest performed an exorcism on Rebecca not too long ago, but refuses to do so for Chelsea now. He’s too afraid.

Megan and Tommy burst into the cabin where Caleb is trying to perform an exorcism on his daughter. Chelsea thrashes about violently and stabs herself repeatedly with a crucifix. She punctures her lung. Megan tries to save her. Chelsea says, “Quarter for your jacket, pumpkin. Don’t forget.” This stops Megan in her tracks. It obviously has some meaning to her. Megan regroups to get Chelsea breathing again. She’s rushed to the hospital. Chelsea’s sister, Hannah, wants Megan to pray with her. That’s not something Megan can do.