Grissom investigates a possible suicide at a high-profile construction site. Against the wishes of the Sheriff, Grissom pushes to get at the truth of the matter-he thinks the suicide was actually a homicide, and uses theories on electrocution to look for his killer. Meanwhile, Nick and Catherine take on a case with little more than angora fibers to follow. A teenage boy dies while in session with his female psychologist, and traces of angora on his underwear make them believe the psychologist may be practicing very unconventional methods of "therapy."

Grissom, Sara and Warrick are called in to investigate an abandoned, blood-splattered apartment and Nick and Catherine must examine a dead scuba diver lodged in a tree.

The team members are suspicious when the former tenant of the bloody apartment claims that his missing girlfriend is visiting her parents -- and the parents say she never showed up.

Meanwhile, Nick and Catherine are called to the site of a large fire and are confronted with the scuba diver found dead in the top of a tree near Lake Mead. Is it a murder or an urban legend turned fact?