Catherine Willows becomes part of a kidnapping when a suspicious-looking man is questioned about his bloodied hands. Upon release, Catherine, who is after the man to return his glasses, is told to get in the vehicle by a voice on the phone. The man's girlfriend has been kidnapped and will be killed if he doesn't deliver the ransom money on time. An important piece of evidence is the girlfriend's severed finger, given to her lover by the kidnapper.