The BAU heads to St. Louis, Missouri where ten year old Andrew Taffert has gone missing. The reason it is a BAU case is that the Tafferts - father Malcolm Taffert and mother Lida Taffert - had been receiving prank calls from someone with a childlike voice stating "I'm gonna get you", and that blood was splattered on their front door after Andy had gone missing. Reid notices that this case is much like a fifteen year old cold case that the BAU worked on where the parents in that situation received such prank calls prior to their son being abducted and eventually found dead. The father in that case, Richard Clayvin, was always considered a suspect. As such, Malcolm is initially considered a prime suspect, especially considering his over controlling temperament. The similarity between the two cases extends to the post-abduction prank calls with the voice changing its statement to, "Did you see what I did?". But as the investigation progresses, which includes re-interviewing Richard Clayvin, the team may have to find other similarities before they can identify the unsub.