A package bearing no return address arrives at the Anthropology Department of the University of. Nevada...and a shocking discovery is made upon opening the box: a genuine shrunken head. At first, Gil Grissom and his team of crime scene investigators -- Catherine Willows, Warrick Brown, Nick Stokes, and Greg Sanders -- consider this merely an oddity, a grisly relic from the past. But when all the evidence points to the fact that it's really the result of a gruesome modern-day murder, suspicions run high that a brutal serial killer with an unorthodox modus operandi may now be on the loose....