The NCIS team searches for the person and motive behind a contract killer targeting a Navy Lieutenant Commander.

Meanwhile, Abby uncovers new information about her family after undergoing tests for a kidney donation.

When the body of a missing NCIS facilities manager is found four months after disappearing on the day of the Navy Yard bombings, the NCIS team is assigned to investigate the strange case for one of their own. Meanwhile, the team is required to complete mandatory psych evaluations with a crisis counselor, and Gibbs is most concerned about Abby’s recurring nightmares since the bombing.