When 13-year-old Matthew disappears from church, the team springs into action. Gabi endeavors to keep the divorced parents focused on the search. Gabi is forced to make a devastating choice. Lacey makes a keen observation about Gabi.
Gabi and the team revisit a previous case involving child trafficking and their heated investigation leads them in a shocking direction. Gabi confronts Sir about another one of his possible victims.
Seth pulls off a magnanimous gesture for Summer, then blows it. Lindsay and Ryan become physics lab partners and share some romantic chemistry. Embattled Caleb names Julie as Newport Group's CE-uh-O.
The wife of a Marine who specialized in K-9 bomb detection urges the NCIS team to investigate the recent death of her husband in Afghanistan. Meanwhile, Director Vance asks for the team's assistance as he interviews nannies.
A video of a bloodied, half-naked man walking down the street with a gun goes viral and the team must decide if the victim was targeted or a potential suicide.