CBI is forced to work with two Davis police officers to solve a double homicide involving a star witness in a drug trial. However, CBI soon suspects that the officers may have a connection to the other victim in the case.
A young football talent in a small town is found dead, apparently killed in a black magic sacrifice ritual, and the center of the investigation becomes a self-proclaimed Wicca whose cat was allegedly tortured and killed by the victim.
Car salesman Carl Resnick brings CBI the body of Mary Beth Hendricks (27), thinking it's a 'sack of potatoes': resulting from a masterly hypnotic suggestion, which leads Patrick Jane and CBI to investigate a man who uses hypnosis to trick people into doing his crimes for him.
A victim is discovered in a park deliberately disposed of in CBI jurisdiction with evidence that Red John is involved. The team learns there may be another victim, and suspects Red John is luring Jane.