Booth and Bones arrive at a crime scene on the border of Oklahoma and Texas. They meet with both the OK and TX local police who are arguing over who's territory the crime scene is in. Bones asks to see the remains. She sees two skeletons and estimates the time of death about a month ago. Bones says the bones look like they are both females that were conjoined twins. Bones tells the officers that they will take over jurisdiction.

Nigel tells Camille and Bones that conjoined twins are rare. They wonder what exposed the bones. Angela tells the team that there was a sandstorm eight days ago. She says it should be easy to identify the remains since there are not many conjoined twins. Angela searches the database for missing conjoined twins.

Bones sees that the manner which the bodies were attached means that neither one could survive the death of the other. They figure the deaths were a result of murder/suicide. Hodgins comes back with a soil analysis and says there were traces of cotton and mites. He says the mites could only be found 100 miles away. He adds that he also found decomposed popcorn and Nigel says it must have been a traveling circus.

Sweets says wrapped naked bodies could mean there was sexual assault. Booth says he's going to talk to the circus. Sweets says circus folk are close knit and don't talk to outsiders. Booth and Bones ask how he knows. Sweets says he was adopted and went to a circus to find his birth mother, but no one would talk to him. Bones tells Booth that if they're going to talk to the circus, they're going to need an act.

Booth and Bones make a plan on their way to the circus. Booth says they need to get a mobile home to make their story more authentic. Bones says she thinks it might only take a night to talk to the girl's mother and find out what happened. Booth says he hopes not.

Booth and Bones meet with the twin's mother, Sandra Hicks and her husband/lawyer Dell. Booth asks about the lawsuits Sandra had against the circus. Dell lists the charges and Sandra says they stole her daughters. They say they last saw their daughters 4 months ago. Dell says Jenny wanted nothing to do with them and Sandra says they both wanted it. Dell says if Jenny wanted it, then it didn't matter what Julie wanted. Bones asks if they ever considered having them separated. Sandra says Julie and her thought it was too dangerous. Bones asks if the daughters disagreed on whether or not to be separated.

Booth and Bones talk to the twins doctor. He says he and Jenny thought the twins could safely be separated. He says it didn't matter what anyone thought, the twins had to come to an agreement before he could operate. He says the twins loved the circus and found ways to expand their act. He says they were just like any other sisters and had separate personalities.

Booth and Bones show up at the circus in disguise. They talk to the ringleader and explain their knife throwing/high wire act. He asks them what their hook is and Booth says they are Russian. He asks to see their act and Booth successfully throws some knives, impressing Bones.

Booth and Bones return to their mobile home. They call Sweets and ask him what the circus lingo means. Sweets offers to email them a lexicon. Sweets tells Booth and Bones to not act like they are interested in any of them. He advises that Booth and Bones just pay attention to each other and let the circus members go to them. Booth gets and idea to shake the trailer to make it look like they are having sex. The ringleader and the midget stand outside and watch the trailer rock.

Booth walks into the tent and asks about Julie and Jenny. He says he used to work with them at another place. The ringleader say they don't work there anymore. He then pulls out a note from Julie and Jenny that says thanks for everything, but they're moving on. Bones says she's sure they'll run into them somewhere since there aren't many circuses anymore.

Back at headquarters, the team watches videos of the twins juggling. Nigel says the bones show a stab wound on the hand and Camille says they were juggling knives. Hodgins and Nigel then get into a spat over details. Angela walks in and says the note was written by a left handed person, but signed by both a right and left handed person. She says that the note is obviously fake.

Booth and Bones talk to the others about the girls. The ringleader says the clowns are the only ones who don't miss them. The detectives learn that the twins stole acts from the clowns to try to get more business for the circus. Someone then mentions that Julie had a boyfriend. Bones asks how that is possible if she had her sister attached to her all the time.