When 5 people who are either Navy or Marine are found dead in a diner, the team goes to investigate. While there Diane shows up and Rebecca Gibbs second ex-wife is with her. Rebecca says she and Jethro need to talk. Gibbs goes home to avoid her but she shows up and says she wants to apologize for what she did during their marriage. McGee informs Gibbs that all five went to the same tax firm. Gibbs and McGee go there and discover that it's empty and there were signs of a shoot out. They learn that blood found there, are all from the victims at the diner. Which means they were killed there and brought to the diner. Later another man is killed. When the body is examined, Ducky points out that the body resembles how Mike Franks was killed. And Abby points out that the diner resembles what happened when Jenny Sheppard was killed. Later he gets a call from Diane asking him to meet her. He goes to a roof top and meets but she asks him what he wants. She says he called her that's when Gibbs tells her they need to leave that's when someone shoots her with a sniper rifle in the same way Caitlin Todd was killed.