The twelth season finds Callen and Sam continuing to take on dangerous, vital cases with international ties while working to find balance as they each try to maintain new and blossoming relationships. Also, Hetty finds a cryptic way to lure Nell back to NCIS, and Deeks and Kensi will take the big step of looking to purchase their first home as they continue to try to have a baby, which may need to take a backseat when Deeks finds himself sidelined from his job, and a case from Kensi's past will put her life in jeopardy.