After a young actor Mike, is wounded and his fiancee is shot dead on the street, Detectives Goren and Eames are pointed towards the surviving victim's former girlfriend, who is known to have stalked him. The key, however, might turn on their probe of "geocaching," a high-tech treasure-hunt game that could yield vital clues. As the media and public mourn the man's tragic loss, the police want to take another look at some of his acting buddies, especially one who never lets go of his Palm Pilot.