A former prison warden enlists the help of Walter to find a bullet that could prove the innocence of a death row inmate just days before his execution. Meanwhile, FBI psychologist - and Jeffersonian team member - Dr. Lance Sweets evaluates Walter's competency to consult on federal cases. In the process, Sweets begins to understand Walter's intangible gift and motivation to find the unfindable. Also, Willa attends a beach party and gets herself into trouble.

Xavier Obispo, a mob boss in Miami, asks Walter to find a voodoo doll he is convinced was created to be used against him. Willa and Walter visit a witch who is annoyed by the fact that Walter does not take her art seriously, but decides to help them find the person that could have created the doll.