Claire believes recent murders in town are supernatural and asks Sam and Dean to investigate. However, Sheriff Mills tells the guys that Claire has been getting into trouble lately and has been attacking normal people ...
Sam and Dean investigate the murders of mediums in Lily Dale, the most "psychic" town in America. They discover that an angry spirit is killing off the psychics, but in a town full of people who claim to be summoning spirits, they have a little trouble identifying the medium controlling the ghost.
After a ballerina is found dead from dancing herself to death, Sam and Dean look into the case and discover the ballet slippers she wore were cursed. When Dean accidentally touches the shoes the power of the curse starts to take hold of him.
Sam and Dean discover that Frank's hard drive, containing everything on the leviathans, is now in Dick's company building. To retrieve it, they ask for help from one of the employees, a young computer hacker.