Clark decides to join the football team over Jonathan's wishes and gets the starting quarterback position when his predecessor attacks Jason over a girl. Clark and Lois investigate and discover that the cheerleaders are using kryptontie in the team's water supply to turn them into obedient mindless boyfriends.

Lex is accused of killing a young woman and Clark turns to Lionel for help. Meanwhile, Lana has a dream of her ancestor and a mysterious second woman - a dead ringer for Jason's mother Genevieve, who arrives to visit her son and his new girlfriend.

Lois accidentally hits a dog and brings it back to the farm to heal, but Clark quickly realizes it has super-strength. He investigates and discovers it was part of an aborted LuthorCorp experiment...and that robbers are using the dogs to help them steal money. Meanwhile, Lana wonders what Jason is up to with his mother, and Jason is forced to ask Genevieve a few questions of his own.

On the eve of the Smallville High School Prom, stuck-up candidate for Prom Queen Dawn Stiles is pulled into a coma when she is involved in a car crash into a ravine filled with dozens of chunks of kryptonite. While her body lies in a coma, Dawn finds her spirit allowed to possess the bodies of others, where she can continue her quest to become Prom Queen. As a result, Martha, her body possessed by Dawn, flirts with Clark and asks him to the Prom, Lana attempts to electrocute the ex-boyfriend who dumped Dawn, Lois goes all-out to ensure she and Clark go to Prom together, and Chloe attempts to set fire to the school on Prom night.