A high-speed car chase ends with the Las Vegas Police finding two girls joyriding in their undergarments, with a decapitated head in their truck. After Grissom is able to I.D. the victim, the initial suspect is the man painting the victim’s house; but, after further investigation, the evidence leads to an even more shocking discovery. Meanwhile, Nick and Sara are sent to the desert to investigate a headless corpse that initially seems to be related to the disembodied head in Grissom’s case. Meanwhile, Warrick again helps James Moore, the kid in juvenile detention for a hit and run incident with whom he has kept in touch. This time, James is caught in the middle of a gang war after witnessing a fellow inmate's murder.