A call comes into the lab while the team works on a body. It's Angela calling from Santa Fe, and she asks to speak with Brennan in private. Her boyfriend, Kirk Persinger, has been missing five days. He left with a guide for a one-day photo shoot in the desert, and never returned. To add to the mystery, a human skull was left on the local Sheriff's porch that day. Sensing the fear and urgency in Angela voice, Brennan packs her bags and heads to the desert. Upon arriving, Angela and Brennan head over to the Sheriff Ben Dawes' office. Brennan examines the skull, and quickly reveals that it was a male, Caucasian, and 30-35 yrs of age. She then notices bevel marks at the base of the skull indicating a gunshot wound...