Dawn Stiles, the haughty lead contender for Smallville High prom queen, is irritated when Chloe is nominated and her boyfriend dumps her. But as she settles on Clark for her new date, Dawn crashes her SUV into a kryptonite-filled ravine, releasing her spirit and granting it the ability to possess the bodies of the living. Leaping from body to body, she has Martha dance wildly, Lana try to kill Dawn's ex-boyfriend, and Lois ask Clark to the prom. When Chloe is the winner, Dawn prepares to set the school on fire in revenge, and only Clark can stop her.