When the body of several murdered homeless men are found sold to medical labs, Detectives Goren and Eames descend into abandoned subway tunnels - where they encounter its tormented inhabitants - until they discover all of the victims were newly registered for credit cards that were maxed out after their deaths. As they probe further, the investigators find a link to a suspicious auto parts salesman and his addled middle-aged girlfriend.

A female antique appraiser is murdered, and Detectives Goren and Eames lock onto the trail of an elusive, highly organized and proficient thief who specializes in lifting priceless silver settings. The Major Case squad discovers a long line of burglaries attributed to their taunting suspect -- but an arrest will only stick if they can link him to his treasure stash of valuables.