When the team goes up against a conman from a long lineage of greats, they must pull off the biggest con of their careers.

Jim Sterling asks Nate for help taking down a researcher who has designed a calibration weight for a nuclear reactor that will allow a terrorist nation to manufacture enriched uranium. The con occurs during an international chess tournament. However, it soon becomes clear that the Interpol agent has an ulterior motive, one which isolates Nate, gets Sophie arrested, and takes Eliot out of commission.