 On a rural Texas highway, a fire is discovered in which three bodies have been burnt beyond recognition. Dr. G finds bullets in all three bodies, and determines that they were all fatally shot before being set on fire. Working together with the Texas Rangers, she must identify the victims and help to find who killed them. A 55-year-old man is dies while on a city bus. No one saw him die, so he is sent to the morgue for an autopsy. With no medical records available, Dr. G must consider all possibilities as she looks for the cause of death.