The team investigates the death of Lieutenant James Simms. James' body was found on the side of the road of some remote highway. Test results show that he has ecstasy in his system, as well as an abnormally high amount of water, which means that the victim drowned in his own skin. We find out that James' wife had left him after he cheated on her, one too many times.
The team finds another victim, Samuel Alcott, who is found dead in the same area nearby. They suspect that this is the work of a serial killer. The team finds out that Samuel and James knew each other from counseling through the military, since Samuel also cheated on his wife.
The team pokes fun of Ducky and his new girlfriend, Dr. Mary Courtney. In a strange turn of events, it is revealed that Mary is the killer. She was the administrator at the counseling services where James and Samuel were treated. She killed them because it was her own pathological way of showing Ducky something he's never seen before.