Booth goes to the neighborhood and watches the neighbors go through their daily routine. Hodgins arrives and tells them that he found particles from three plants from three different yards on the saw that wounded Kurt. They see Trey use a reciprocating saw and decide to question him.

They ask him if Kelly asked him to kill Kurt. Booth asks him who he was has a relationship with. Trey admits that he was sleeping with one of the neighbor's daughter, Paige, and Elliot's wife, Paula. He says that Kurt caught him sleeping with Paula. Trey says that he has a real girlfriend at his own neighborhood. They wonder if Elliot's wife Paula killed Kurt to keep him quiet.

They go to Paula's house to ask her questions. She says that she thinks that she emasculated Elliot when they moved to the suburbs. Bones figures that Paula is a therapist since she talks like one. Paula says that Kurt just smirked when he found out that she was having an affair with Trey. Paula admits that she sensed that Kurt was having an affair with Paige and used the information to retrieve the $5,000 that Elliot paid him. Paula suggests that they speak to Bob.

Paige admits that she hooked up with Kurt. She admired how Kurt was committed to save the environment. Booth suggests that her having sex with Kurt might have killed him. Paige says that Kurt was in awesome shape. Booth and Bones clarify and say that her dad or Trey might have found out about her relationship and killed him.

Sweets meets with Arastoo and tells him that he knows that he is faking his accent. He figures that he faked his accent instead of having to explain his Muslim religion all the time. He tells him that he doesn't have to pretend that he has an accent anymore.

Cam says that she found saltpeter in Kurt's system, which is sometimes given to people in hopes that it will decrease a man's sex drive. Booth says that he was given saltpeter in Catholic school, but it didn't work on him. Cam and Bones figure that Kurt could have bled to death from internal wounds if he was given saltpeter, which is a blood thinner. Bones wonders if Kelly drugged Kurt to prevent him from cheating.

They bring Kelly to the interrogation room. She confesses that she used stump remover, which consists mostly of saltpeter, to drug Kurt. Kelly informs them that Kurt was also sleeping with Bob's wife, Kate. They wonder if Bob found out and killed Kurt.

They bring in Kate and tell her that they know she had an affair with Kurt. She is surprised that Kurt was sleeping with her daughter and Paula. Booth informs her that they suspect Bob of killing Kurt after he found out that she was having an affair.

Hodgins reports that he found lubricant in a fracture of Kurt's skull. Arastoo arrives late and apologizes using his normal voice. Angela and Hodgins are surprised that he doesn't have an accent. He confesses that he was faking it. He says that Kurt was hit in the head when he was on the ground. Angela wonders if Kurt was hit by a golf club. Cam tells the team to find out what caused Kurt's puncture wound.