The original NCIS team (Gibbs, Ziva, Tony, and McGee) are all grown up and retired. Ziva and Tony are happily married with two children, a boy, Ari and a girl, Tahli Kate. McGee and Abby are also an item and have a girl named Kelly. Gibbs and Jenny live together, raising two boys, Richard and Leroy Jr. Ari, Tahli, Kelly, Richard, and Leroy Jr. are all good friends and go to highschool together. They are all happy until a murder happens at their highschool and they are determined to solve the case and catch the criminal just like their parents did before them.