Bones and Booth are in the car discussing how rich Bones is from her books. Booth tries to give Bones financial advice by telling her to build a house. They arrive at a scene in which a body is burned in a convertible. The woman was doused in gasoline before being burned. Bones also discovers that she had given birth and had broken bones in her leg as well as skull trauma. She's not sure if the woman died before the fire or because of it. Booth sees a baby bag in the back seat. After hearing a noise, they look up and discover a baby in a car seat up in a tree. Booth takes the boy, but Bones seems uncomfortable around him. She tells the sheriff she needs the body and the car door.
Booth is changing the baby's diaper on the scene and while looking in the diaper bag for powder, Bones instead finds a key. Booth goes to find baby powder from the EMTs and when he returns, they discover the baby has swallowed the key after Bones set it down next to him. He hands the baby to Bones and tells her they're keeping the baby until they get the key back since it is evidence. The baby proceeds to pee on Bones' shoes.
Back at the Jeffersonian, Angela, Cam and Zack are looking at the baby. Angela tells Zack that Bones is a registered foster parent in order to take care of her brother's kids in case something happens to them, and that's why she's in charge of the baby. Hodgins brings a metal detector wand to verify the baby swallowed the key, and Bones walks up and tells them he should be x-rayed. She asks Angela to take the baby so she can work. After Angela picks him up she tells Hodgins she wants a big family.
Booth has investigated the car and found out it was registered to a dead guy, whose family sold it to a junk yard in Seneca Valley. Cam, Zack and Bones discover the victim was dead before being burned. Angela brings in a used diaper with pink stool, and Cam goes to analyze it. Hodgins uses ground bones and particulate matter from the victim to find out where she was from – Huntsville, West Virginia. The baby starts crying, causing Booth and Brennan to argue until Angela arrives with her rendering of the victim. Bones verifies through genetic similarities that the victim was likely the baby's mother. She decides to go to the victim's home town.
As they're driving, Booth talks to Bones about the house she could build. Bones disregards his comments and seems sad that the baby is alone in the world. Booth says that the baby has her. When they arrive, they find the town to be dying economically and argue with a local man about working for the government. His wife comes out and recognizes the baby, calling him Andy.
They go to talk to the Grant family, who used to take care of the baby. Carol Grant tells them the baby's mother was Meg Taylor. Jimmy Grant tells them Meg's husband has been in and out of prison and is not really in the picture. They also discuss the economy of the town. Jimmy was a high school science teacher and Carol was a project manager on construction sites. Carol asks if she can watch Andy, but Booth tells her they need to keep him for now.
As they're driving to where Meg lived, Cam calls Bones and tells her the pink coloration of the baby's stool was from a dye used to detect Phenobarbital, meaning the baby tested positive. Cam tells them that it is sometimes used to treat seizures. There's also a slight chance he ingested it breastfeeding, but it's very unlikely. When they arrive at Meg's residence, Booth sees the front door open and makes Bones stay in the car with the baby and promise to drive away if she hears gunfire, to which she agrees very reluctantly.
Booth enters the trailer and finds a man (Meg's husband) tossing the place. He tries to run, but Booth catches him and handcuffs him. He first tells Booth he lives there, then tells him he was there to check on Meg. Booth wants to know which it is, and he tells Booth Meg likes to help him. After Booth tells him Meg is dead, the man can't remember where he was when she was killed.
At the lab, Angela is looking at the key in the x-ray, telling Cam that it looks like a safe deposit box key. Cam asks her how many kids she wants and Angela says the feds will probably have to airlift in supplies after she has so many. Cam tells her she's not willing to give up her body for the cons of raising a child.
When Booth and Bones are looking through Meg's trailer, Bones sees that Meg loved her son and tried to take good care of him. Zack calls Bones and tells her Meg had healed injuries due to malnourishment as well as some minor deformities. Even though these things, along with her physically demanding job, would cause chronic pain, she was taking no pain killers according to the toxicology screen. Bones thinks it's because she was breastfeeding.
Booth and Bones go to visit Meg's boss at the tire recycling plant and find out she was seeing a corporate accountant named Dave Shepherd, who was responsible for many layoffs. Her coworkers also tell them how much she loved Andy. When they get out to the car, they change Andy's diaper and find the key. Over video-phone, Bones tells Angela the series of numbers on the key and Angela finds the address of the bank. After seeing the baby's legs are bowed, Bones tells Angela to tell Zack to run a p-ratio test on the victim's teeth. Now that they have the key, Booth wants to leave the baby with family services, but Bones vehemently disagrees due to her past history. She seems to be warming up to the baby.
When they go to the bank, they find a gun with the serial numbers filed off in the safe deposit box. Bones wants to go to the town's pool. Jimmy Grant meets them there to let them in and Bones finds an acid which, Jimmy tells Booth, will restore the etchings of the serial numbers.
Later, Booth is interviewing the man who owned the gun, who tells him he pawned the gun. He had also assaulted the plant manager where he worked, as well as Dave Shepherd, because every time he comes to town people get laid off. He gives Booth the address of the pawn shop but tells him it closed down.
At the lab Zack and Hodgins discover particulate bone matter inside the gun barrel, also finding brain tissue, meaning someone was shot in the head at extremely close range. Hodgins also finds burned skin on the trigger, which Cam can use to find DNA. In Bones' office, she tells Booth that she's going to try to talk to some politicians whose campaigns she supported into rebuilding the bridge into Huntsville to help revitalize the town's economy. Cam comes to tell them the burned skin on the gun's trigger belonged to a male. Booth receives a phone call telling him Dave Shepherd's credit card was used at a hotel in Huntsville.
When Booth gets to the holding cell he instead finds a bum, who in turn had found Shepherd's bag in a trash heap. The bag had blood on it. Booth takes it back to DC. Cam compares the DNA from the bag to the DNA from the bones in the gun and finds they were Shepherd's. So he wasn't the killer, he was killed by another man. Angela goes to Hodgins' office and asks him if he wants kids. He says he wanted one or two, but he's willing to have as many as she likes. He tells her he'll find her sexy and love her no matter what happens to her body and that they should start trying to have kids soon. She hurriedly interrupts him by telling him his computer is beeping. It has results from the particulates on the gun - it was used in a tire recycling plant.
Booth and Brennan head back to the plant. Bones goes to the top of one of the tire shredders and they speculate the machine could have been used to dispose of Shepherd's body. One of the workers tells them they ship off the rubber mulch every week, meaning Shepherd's body might still be in the mulch. Although the mulch has been rinsed and cleaned, Booth helps Bones go through each bag, scooping a bit of the rubber into a jar of water. After looking at several of these samples, Brennan shows Booth that the rubber floats, but bone sinks. They find bone in one of the bags. Angela calls Brennan and tells her that Shepherd's profit reports on the plant had been doctored by someone who stole the money and put it into private accounts. Brennan and Booth speculate that if Shepherd and Meg found out about the doctoring then that's probably why they were killed.
They go back to the plant to ask for the manager, Barnett, only to find out that he's already left. As he's driving off, Booth cuts him off and chases him backwards down an alley. Barnett tries to flee on foot, but Booth catches and arrests him. He reveals that he was embezzling money to take care of his family. Bones asks him if that justifies killing two innocent people. Barnett tells her Shepherd would have turned him in and that Meg saw what happened, got ahold of the gun, and wanted money from Barnett to take Andy to a doctor in DC. He followed her out of town and killed her, and Bones is enraged because he did so while a baby was in the car.
Later at the Jeffersonian, Brennan is feeding Andy when Booth walks in with a letter found in Meg's trailer that she had written to her friend Carol Grant. Cam walks in and reveals that Andy has a genetic disorder called vitamin-D resistant rickets, which his mother had in a mild form. Since symptoms are more severe in males, Andy would have shown more outright signs than his mother had, including seizures. Cam tells them the clinic Meg took him to probably prescribed the Phenobarbital without looking for the underlying causes but that he will be okay.
Later, they give the letter to Mrs. Grant, which tells her that Meg wanted her to take care of Andy. The Grants adopt him and take him home.
Booth and Brennan are having coffee while sitting in the back of Booth's SUV, talking about how much they'll miss Andy. He asks her if she still doesn't want to have kids, but she doesn't answer him. He teases her about the fact that she doesn't have much longer and she hits him, spilling his coffee in the back of the car. Brennan is wiping off some papers and tells Booth they are information given to her by Carol Grant from a structural engineer. Booth asks if she's taking his advice and building a house, and she tells him she's rebuilding the bridge into Huntsville since the government won't do it and has hired Carol as the project manager. She wants to help save the town because something as simple as a bridge can put them back on the scenic route and help their economy. Booth teases her again about building a house with a big plasma screen TV where Andy can visit them. He starts baby-talking and Brennan sticks a pacifier in his mouth to shut him up.





