In the span of a week, the dead and beaten bodies of two Caucasian mid-teen boys are found in the aftermath of tornadoes in Wichita, Kansas. In addition, different body parts are missing from each boy, and each boy was a runaway who made money through street hustling. After dismissing the notion of the unsub wanting the authorities to believe the storms caused the pre-death trauma, the BAU determine that the tornadoes in and of themselves are part of the reason for the unsub's murder spree. After more bodies with different missing limbs are found, the BAU begins to figure out exactly what the unsub is planning on doing with the taken body parts. They get a break when there is a witness to the abduction of another teen-aged boy, albeit one with a stable family life. This latest act shows the team that the unsub is nearing the completion of his task which will take him, and by association them into chasing yet another tornado. Meanwhile, JJ and Will are having problems based on JJ's return to work with the BAU.