In the aftermath of Catherine's suicide, Detective John Cardinal outwardly accepts the evidence that she took her own life, but when he starts to receive taunting greeting cards blaming him for her death, he begins to question the suicide.
After Ziva's apparent death, Tony raises their daughter Tali. Years later, Ziva returns, and reunites with Tony. Tony's company is attacked, the family goes to Europe, trying to learn who's after them and to trust each other again.