When Jack Drey, a South Carolina state police lieutenant, throws his weight around in the investigation of the disappearance of his adulterous brother-in-law, Hack Weller, Sheriff Buck becomes wary. Drey suspects that Weller's obsession with Selena might have driven a vicious Buck to kill him. Gail solves part of the mystery at the Trinity Natural History Museum, where she learns more about skeletons. Meanwhile, Caleb, who found one of the skeletons, becomes curious about his roots and, in a dream, finds his own grave and digs it up, unearthing his double, a horrifying evil twin. After awakening from the nightmare, Caleb takes a shovel and heads for the gravesite -- with Buck following.