Grissom and Catherine investigate the apparent violent death of a woman found in a sandbox. Their investigation leads them to the underground world of s and m clubs. Meanwhile, Warrick and Sara are called to a crime scene to investigate a shoot, which initially appears to have taken place during a robbery.
Lady Heather's Box Grissom connects two murdered male escorts to dominatrix Lady Heather; Catherine's daughter, Lindsay, is trapped in a sinking car.
Snuff Catherine is called in by a pornographic-film developer to view graphic footage from a snuff movie in which a woman is brutally slain. Grissom investigates an ant covered body that's been dead over a year.
A woman is abducted from a supermarket. In the store, Grissom finds a bathroom stall door that claims five women have been killed. Warrick is caught in a casino on duty and is paired with a reluctant Sara. Their case is the apparent murder and robbery of a man who is found to be his brother. Nick gets pulled in by his prostitute friend who gets in a scuffle with hotel security.
The Execution of Catherine Willows
Fifteen years ago, Catherine helped put a man on death row for the rape and murder of a coed at a nearby college. The man is about to be executed when he's granted a stay based on new DNA evidence. When bodies turn up at the school, killed in identical manners, it's thought the killer might actually be on the loose.
What's Eating Gilbert Grissom?
The killer from The Exectution of Catherine Willows returns with deadly results. The entire team is engaged in a race against time to stop this sadistic killer from succeeding again. Grissom is additionally distraught by the idea that this killer is smarter than he is.