The team conducts an undercover sting to locate a cyber crime lord, but the operation is foiled by a charming, brilliant hacker whose desire to take over the online black markets puts him in a dangerous online turf war that could lead to murder.

When robbers hit a diamond exchange and take hostages, Don and the team find an unlikely ally in convict John Buckley, who may help the team's investigation when they believe the men are copying Buckley's criminal strategies.