Following a tip about smuggled weapons, Bishop and Torres engage in a shootout in a former sheriff's residence that's now a historical site, only to find themselves locked in abandoned jail cells there.

When Sloane's name is discovered in Afghanistan at the site of an abandoned bus with a dead driver, Gibbs accompanies her on a trip to find a group of girls who were kidnapped from the bus. Also, McGee, Bishop and Torres track down a hacker who emailed compromising information to the Taliban.