It has been three years since Tony and Ziva got married, and they got a big case. It seems like a friend of Gibbs needs his help. They did not know Gibbs had retired so they asked Tony and Ziva for help. A friend of Gibbs’ children needs help. She is scared of this person because he knew of Gibbs’ past and the Mexican drug cartel.
When Gibbs finds out, he helps the new team. But he ends up getting killed be- cause it was the President of Mexico troubling the team, who was also the friend of Gibbs’ child. Tony gets mad that our government gave the President a free ride so he sets out for revenge for the life of his old boss.