When Billy Sparks, an autistic boy, is the only witness to the violent abduction of his parents, the BAU team must travel to coastal Louisiana in order to solve the crime.

What they find is a community that is financially devastated by the oil spill and a frightened, mute Billy who can only communicate through his piano.

As the UnSub drags Billy's mother to banks and check cashing shops in the hopes of collecting as much cash as possible, the team begins to wonder if they're dealing with a true psychopath or a man pushed to the brink by the economic collapse.