Jethro and Jenny Gibbs met during an undercover mission in Paris. They fell in love and got married shortly after their mission ended.

They have three children, Tony, Tim, and Abby.

Both Jethro and Jenny work as Special Agents on the Major Case Response Team for NCIS. Their boss is Mike Franks and the director of NCIS is Tom Morrow.

Tony's childhood sweetheart, Caitlin Todd was killed the year before in a school shooting. Tony was there with her when she died and doesn't like talking about her. Ever since her death, Tony has become an incessant skirtchaser, dating a different girl everyweek.

When a new family, the David's, move in to the Todd house next door, the Gibbs family is in for a whole new ride.