Clark begins experiencing "vision problems" as his x-ray vision begins manifesting. Meanwhile a mysterious shapeshifter is going about town using his or her abilities to steal and get others in trouble.

Clark visits Metropolis in this episode, and does a secret good deed - a police detective witnesses this and decides to look into it. He contacts Lex and reminds Lex that he knows about his past in order to get him to talk. The detective, Phelan, discovers that Clark had been around many "accident scenes" in recent months, and he decides to look into it. Phelan begins blackmailing Clark to help protect him from an IA investigation. When Clark balks Phelan frames Jonathan. Clark manages to set up Phelan for the theft of a rare piece at a museum and Phelan is killed in the shootout before he can tell anyone about Clark's secret. Lex is left to wonder at the superspeed image captured on a museum camera.

Lex and Victoria are victims of a suspected household poltergeist. As the disturbances become more violent, suspicion lands on Amy, the daughter of a house servant who is obsessed with Lex. Not is all as it seems...

Clark gains a new power - heat-vision. As he struggles to control it, Lex gets married to the new Smallville High teacher, Desiree Atkins, little does he know that she not only has an alterior motive, but that she's coming on to Clark too.

A Smallville student, Ian, displays the ability to make clones of himself and uses his power to date both Chloe and Lana. Meanwhile Lex goes to anger management class and meets an attractive local doctor.

Lionel is shot in the manor, and Jonathan is the prime suspect.

Clark runs up against super-strong robbers who are apparently tied to LexCorp. And Chloe begins to ally with Lionel, while Lana and Henry Small bond.

Perry White, a once promising journalist whose career was destroyed by Lionel Luthor, arrives in Smallville in search of alien stories for a tabloid news show. In spite of being constantly inebriated, Perry believes he has witnessed Clark using his extraordinary speed, so he devises a dangerous scheme to expose Clark's superpowers. Meanwhile, Lex learns that Perry has powerful incriminating evidence of Lionel's shady past.

Clark discovers that his schoolmate Jordan can foresee the future, but is horrified when Jordan tells him he "sees" Lana dying in a fire in the next few days. Meanwhile, suspicious of his behavior, Chloe investigates Adam's background and discovers some disturbing news.