When Jason arrives at Lana's apartment at The Talon, they see that is was broken into and wrecked. They discover that the magical stone they took from the Chinese temple is gone. Lana implores Jason to leave it, and concentrate on their romantic relationship instead. But the two meet at Lionel's office, who strongly denies any knowledge of the theft and accuses his son Lex, who makes another innocence-claimant. Meanwhile, the Kent farm gets an uninvited guest's guest: Lois Lane's younger sister Lucy, a violinist who left her fancy Swiss boarding school. The Lane girls start hanging out at Clark's place and at The Talon, where Clark catches Lucy stealing from the till; she says to be in debt with Swiss loan shark Marcus Becker "to afford the lifestyle" of the spoiled brats in her class. Lex knows Becker as member of a major crime syndicate he has business problems with, and offers to help. Becker isn't content to take Lex' money, he kidnaps the sisters to extort more, Clark decides it's time to use his superpowers.

Lana tells Clark that she is moving to the Metropolis University and she is accepted in the Tri Psi Sorority, a sisterhood with hot vampires led by Buffy Sanders, and Lana is transformed in a vampire. Meanwhile, the chief-editor of The Daily Planet, Pauline Kahn, denies an intern position to Chloe, but in the end she proposes Chloe to write a good story to prove that she might be part of the team of reporters. Meanwhile, Lex intimidates Professor Milton Fine, but in retribution he shows a dossier about the secret experiments that Luthorcorp is performing in the campus of the Kansas University. When Clark sees Lana at Chloe's room, he believes she is with a hangover; later, he goes with Lana to a Halloween costume party promoted by the Tri Psi. When Lana attacks Chloe, Clark discloses the truth about Buffy and her sisterhood of vampires and tries to find a means to save Lana and Chloe when she gets bitten by the evil vamp Lana.

Oliver enjoys his new, public role since he outed himself as super-hero, yet misses Chloe desperately and feeling guilty. His example further inspires Clark to tell at least Lois, but just when they meet to that end an Egyptian jewel allows the Pharaonic goddess Isis to take possession of her body, eager to resuscitate her beloved Osiris, all required being at hand from a major exposition in Metropolis, but that would also revive his realm, hell, on earth. Tess, who is otherwise preoccupied with Lex's boy-clone Alexander, joins Oliver and Clark at Watchtower, where she proves herself able to fill in for Chloe IT-wise. Even with that invaluable research, Clark nearly perishes in his supernatural duel with Isis. Cat get caught in the fight and mistakenly believes Lois is the evil Blur.