The investigators work on two cases: bones found in a mass grave who they fear is the work of a serial killer, and a man who died after falling into a vat of chocolate.

Reed and Libby investigate the suspicious death of a star college football player.

Reed and Libby must deal with a grieving widower and the widower's stepson who believes his mother was murdered.

The coroner's office is quarantined for 48 hours after exposure to a highly contagious plague.

Reed and Libby investigate an accident involving a carload of Elvis impersonators and when Dudley's father, suffering with cancer, dies of an apparent suicide, the police question Dudley's involvement with the death.