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Lois' younger sister, Lucy, with whom Lois doesn't get along, comes to town and charms everyone she meets. However, Clark discovers a darker side to Lucy after he catches her stealing money from a bar and forces her to reveal the truth about her sudden appearance in Smallville - a truth that puts Lois in grave danger. Meanwhile, the crystal disappears from Lana's apartment and Jason accuses Lionel of stealing it. Lois' sister, Lucy, appears in this episode.
Lex: Look at us, Clark. I'm a product of my father's breeding. He needed an heir. But your parents chose you out of love. I'd take your family any day of the week.
Clark: Lex...do you ever miss not having a sibling?
Lex: I used to - until I met you, Clark. You're closer to me than any blood brother.
Clark: I guess no matter how bad you want to, you just can't save everyone.
Chloe: But it doesn't stop you from trying...does it Clark?