Two young boys find the body of Marine LCpl. Lozada, without one hand; Gibbs and company investigate. Ducky says that the victim died elsewhere, and that the traumatic amputation took place postmortem. Lozada served on the guard detail for a high-level think tank, the Sattler Institute, which uses gifted, precocious kids to suggest solutions for military problems, using simpler, cleaner, purer, less linear, less bureaucratic ways of approaching problems. One student, Angela, had a close friendship with Lozada, who was a former member of a gang; a security tape at the institute reveals a clue. Tony and McGee find another connection, but they run into trouble. A maintenance worker at the institute finds the body of a woman. Ziva and Angela go to Ducky's house, but Angela disappears. Angela and the bad guy show up at Angela's house, as do Gibbs, Tony, and Ziva; right and justice trump. Then the gang gather at Ducky's house for a toast and a turkey dinner.