With Ruby at his side, Sam works his mind-mojo to exorcise a demon, but the man taunts him about being a hero and "all the things you and this slut do in the dark." Sam successfully kills the demon, making Ruby smile, but he has no idea Dean is watching outside the window.

Sam tests the working pulse of the host body and reports to Ruby, “I feel good--no more headaches.” He's helping the man walk out when Dean enters, furious, demanding to know who SHE is. "Good to see you again, Dean," says Ruby. Dean immediately attacks her, all set to murder her with the demon-killing knife. Ruby and Dean battle it out until Ruby has Dean in a choke-hold. Sam intervenes, orders her to stop. She does. "Aren't you an obedient little bitch," gasps Dean. Sam sends Ruby to the emergency room with the victim. "Dean!" calls Sam, but his brother walks away from him.


Motel room - Sam sits alone, reading a book. Dean enters and begins packing; he and Ruby can fight demons, they don't need him. Dean punches Sam, hard. "Satisfied?" asks Sam. Dean punches him again. "I guess not," says Sam, his lip bleeding. "Do you even know how far off the reservation you've gone?" demands Dean. "How far from normal, from human?" "I'm just exorcising demons," insists Sam. "WITH YOUR MIND!" shouts Dean. "What else can you do?" "I can send them back to hell," says Sam. "It only works with demons, that's it." Dean doesn't believe that's all. "I'm pulling demons out of innocent people," Sam reminds him, "the knife kills the host!--I've saved more people in the last five months than we've saved in a year!" "Is that what Ruby wants you to think?" asks Dean--”the way she tricked you into using your powers? Slippery slope, brother, because it's going to get darker and darker and God knows where it ends. It's already gone too far. . .if I didn't know you, I would wanna hunt you--and so would other hunters." (oh, God, that hurt me!) Sam, tearing up, says, "You were gone. I was here. I had to keep on fighting without you. And what I'm doing--it works." "Tell me," says Dean, "if it's so terrific, why did you lie about it to me? Why did an angel tell me to stop you? Cas said that if I don't stop you, he will. That means that GOD doesn't want you doing this. So are you just going to stand there telling me that everything is all good?" Sam looks miserable. The phone rings. It's Travis, a fellow hunter, with a case. Although Sam says it's a bad time, he takes the details: Carthage, Missouri, looking for Jack Montgomery.

Carthage, MO - Montgomery house - Jack Montgomery is eating, making a pig out of himself. His wife, watching him devour dinner, asks if he's stoned. Just starving, he says. He asks for dessert, polishes off the mashed potatoes, takes what's left of her steak, even though he's already eaten two. She suggests he has tapeworm. "I've never felt better," he chortles. Later, brushing his teeth, Jack feels sudden agony when his spine appears to pulse painfully inside his body, going into frightening contortions.

Montgomery house - Dean and Sam sit outside in the Impala, observing Jack through the kitchen window. At first, Dean complains there's no evidence of the "weird" Travis asked them to look for. Learning he won't be eating dinner for 45 minutes, Jack helps himself to a beer. He also eats some leftover chicken, peeling off meat like an animal and stuffing it into his mouth. Next, he dives into some raw chopped meat, shoving it into his mouth with ravenous delight, letting the blood pour down his chin and onto his white shirt. (gross!) He acts as if in a trance until his wife calls his name, then he comes out of it, looking guilty. Sam remarks, "I'd say THAT qualifies as weird."

The brothers enter their hotel room to find Travis drinking their beer. He hugs Dean, then Sam, remarking on how tall the latter has gotten. "Are you still a Mathlete?" Travis asks. Sam says no, Dean, teasingly, Sure is!" "John would have been damn proud of you, sticking together like this," says Travis, who has a broken arm. "Nothin' more important than family," agrees Dean. (Why is there always someone to rub it in?) Travis thanks them for their help--did they track down Montgomery? Yes, but all Jack has is a serious case of the munchies and a tendency to eat raw hamburger meat. Travis explains that Jack Montgomery is turning from human to rugaru--nasty suckers. As Travis narrates, we get a glimpse at what's happening at the Montgomery house--Jack's wife cuts herself making dinner, he turns his attention from the fridge to her bleeding finger. Travis explains that first, the rugaru is hungry for everything, then. . .the longpig. Dean needs a translation of what that is; Sam supplies it: "Human flesh." Hunger grows for human flesh until the rugaru can't take it anymore and must enjoy that first juicy chunk. Jack watches his wife wash the blood from her finger, his eyes wide with hunger. "Then it happens," says Travis, "they transform completely and fast." Jack's wife tells him she needs stitches, but he mutters, "I gotta go, I gotta get outta here." She calls after him, but he leaves the house. "One bite is all it takes," says Travis, "eyes, teeth, skin, it all turns; there's no going back, either--they feed once, they're a monster forever, and our man Jack's headed there on a bullet train." Travis explains he killed Jack's father in 1978, creature killed eight people before he took him down--the guy was a dentist who had a pregnant wife. The child was put up for adoption, and by the time Travis found out, he was long gone, lost in the system--he didn't have the heart to track down the child, but he has tracked down the man now.