Clark (Tom Welling) and Lex (Michael Rosenbaum) are stumped when the Luthor mansion is robbed by burglars who seem to have the ability to walk through walls. Lex's curiosity turns to desperation when he discovers the thieves have stolen evidence of his secret project and Clark wonders if his dad was right about Lex's deceit all along.
Kristin Kreuk, Allison Mack, Sam Jones III, Eric Johnson, Annette O'Toole and John Schneider also star. Robert Singer directed the episode written by Philip Levens.

Chloe is badly hurt when three mysterious thieves rob Lex's manor. Lex hushes up the crime because they stole a computer disk with evidence that he is tapped into his father's computer network. It turns out that the robbers are three former jocks who have figured out a way to make tattoos out of a meteor rock distillation that hyper-accelerates their metabolism, letting them walk through walls. The kryptonite tattoos also affect Clark, weakening him. The tattoos' effects are temporary and the subject gradually becomes immune to the effects, so they need new blood and sign up Whitney. The gang tries to blackmail Lex, but Clark intervenes. Whitney finally realizes the hyper-speed gang life isn't for him and turns to Clark and Lana for help. Clark finds Lex's disk, but the gang try to kill Whitney. The leader's tattoo wears off, and he is crushed beneath a car as Clark super-speeds to Whitney's rescue. The two remaining gang members are hauled off to jail, with Lex threatening them to ensure their silence.

Chloe: Clark Kent, investigative reporter - has a nice ring to it.

Lex: Clark, you can't save the world. All you'll end up with is a Messiah complex and a lot of enemies.
Clark: I saved you, didn't I? That turned out all right.

Lex: A man is judged by the quality of his friends. If the quarterback's with them, he'll have to face the consequences.

Lex: You're a teenager, Lana. Mercurial doesn't do you justice.

Clark: The question is, how'd they get inside?
Pete: I don't know. Now stop channeling Chloe and come on.

Martha: Hi, Clark. What are you doing?
Clark: (smashes some logs) Trying to make myself useful.
Jonathan: Hey ,son, we need firewood, not toothpicks.

Chloe: Ah, the sweet smell of freedom.
Clark: Chloe, you were in the hospital, not Alcatraz.

Clark: Chloe, you can't just go snooping around someone's house.
Chloe: It's a mansion. It's designed for snooping.

Lex: Just remember boys - you keep my secret, and I'll keep yours. [pause] And If you don't, you'll find out you're not the only ones who can reach through walls.

Lex: (to Chloe) I look forward to resuming our verbal judo.

Chloe: You know, all this resting is driving me insane. These so-called "health-care professionals" just want me to stay in bed and eat jello.
Clark: Those fascists.

Chloe: Well, I am perturbed with you, Clark. I'm also mad that you didn't put out the Chicago fire of 1871, or prevent the fall of the Roman Empire, making you directly responsible for the Dark Ages.

Clark: How're you feeling?
Chloe: Like a million bucks...that was thrown in the washing machine and set on "spin".

Lex: You have no idea who you're dealing with.

Pete: Oh no, not the Kent 1,000-yard stare.

We meet three former jocks from Smallville High six years ago. At the time, they lost their scholarships and hopes for the future, and started injecting themselves with Kryptonite in the form of green tattoos. This speeds up their metabolism and allows them to walk through matter, for example walking through walls. They attempted to rob the Smallville Savings and Loans, but didn't succeed. In fact, one of them lost his arm that was left in the safe.

They then rob the Luthor vault in the mansion, including a disk that shows that Lex has gained access to LuthorCorp's Intranet. In the process, they seriously injure Chloe Sullivan who was at the mansion interviewing Lex Luthor. Clark Kent is curious as to why Lex did not report the robbery. A few days later, the jocks return to the mansion, and using the disk as collateral, they blackmail Lex for $1 million. Lex promises them he will be in touch with the money.

Unfortunately, the jocks also realize that they are not as strong as they used to be, and that they need to add a new member to their gang. They recruit Whitney Fordman, who has just lost his scholarship and is destined to work in his father's store for the rest of his life. They invite him to a party, and then encourage him to get his first meteorite tattoo. Once he agrees, they take him out to show him his new power. They throw him onto the road in front of a moving truck, and the truck drives right through him.

Wearing face masks, they then take Whitney along to meet up with Lex, who claims to be bringing $1 million, but is in fact carrying an empty case. The jocks get upset with him and start beating Lex up. Whitney complains that this is not what he signed on for. Clark, who had begun to figure things out, interrupts and the jocks quickly leave the scene through the walls. Clark calls to Whitney who turns around and is recognized despite his mask.

He finally admits everything to Lana Lang and Clark. He explains about Lex's disk. Both Clark and Whitney decide to go to the jock's hideout, while they are sleeping and recovering their strengths. In a final showdown, they find the disk at the same time as Lex arrives on the scene. The jocks show up, and, disappointed in Whitney, try to kill him, but Clark saves him. The cops finally show up, and while Lex explains the situation, he cleverly leaves out the fact that the boys could walk through walls. He then turns to the jocks as they are driven away and tells them that he will keep their secret as long as they keep his (his access to LuthorCorp's Intranet).