When a father and son are found with their throats slit, the detectives discover a group of adolescent boys have disappeared from the same neighborhood. When the locals don't cooperate with the investigation, the police believe the boys are being used by someone operating a bicycle theft ring.

Goren and Eames investigate the murder of a math student who had worked in a poker club as a card-counter. They uncover a group of computer nerds, then discover a computer gambling system with tougher suspects. The detectives learn even their own workstations are hit by the ringleader of the group (Ian Kahn).