The CSI team investigates the murders of two unsavory characters, a porn producer and drug dealer, in a seemingly middle-class neighborhood. Initially, the evidence points to a troubled teenager in the neighborhood who happens to be the adopted son of a serial killer. Sara and Nick theorize that he may have taken his obsession with the occult to an extreme level and made them a reality. Langston soon discovers that the boy has a deformity that would make it impossible for him to have committed the murders. As they begin to take a second look at the evidence the team finds that a neighbor currently being touted as a hero is actually the killer. He was a hard-working father who became disgusted that the neighborhood he was raising his child in was becoming rundown with low-life pornographers and drug dealers and decided to take matters into his own hands.