It's almost graduation, and that means it's time for the prom. After a car accident, a meteor-infected student in-the-run for Prom Queen starts body-swapping. Meanwhile, a dead body is found on Lex's mansion grounds.

During a power blackout, Chloe sees the ghost of a girl and cuts her both wrists. Chloe is interned in the hospital, and the psychiatrist diagnoses that she had a breakdown due to stress. Lana asks Lex to send Chloe to a mental institution for treatment since nobody believes her. However, Clark brings his friend to Lois's apartment above The Talon, where Chloe is possessed by a spirit of the dead girl, called Gretchen, and shows Clark the place where the skeleton is hidden in the Talon's wall. Chloe leaves the apartment alone seeking revenge against the killer, while the deranged orderly Michael Westmore kidnaps Lois. Meanwhile, Clark researches for information about the death of Gretchen in old newspapers. Also, Lionel encourages Martha to take the late Jonathan's place as senator to move on with her life.