An unidentified woman is found brutally murdered by the side of the road. In addition to pinpointing the cause of death, Dr. G must collect evidence from the body that will help investigators identify the victim, and the killer. A 41-year-old man goes out for boat ride; hours later, he is found dead at the bottom of the lake. His boat is found intact, with its engine still idling. It's up to Dr. G find out if the man simply drowned, was intoxicated, was knocked unconscious in an accident, or suffered a medical emergency.