Grissom and Sara investigate when the body of a woman is found in the desert, covered with insects. Grissom uses entomological evidence to discover the time of death. Unfortunately their prime suspect - the husband - was out of town at that time, and to Sara's dismay it looks like he is getting away with murder. Meanwhile Warrick and Catherine try to find out who stole a painting. Nick deals with a missing persons case when a woman's car is found at a bus station.