When the Navy locates a WWII era-sub presumed lost with all hands for 59 years, a treasure hunter named Jack Riggins goes to court to claim the salvage rights. Riggins wants to search for proof that the US hid information about whether the sub spotted the Japanese before the attack on Pearl Harbor. It soon is discovered that the sub did spot the attacking fleet, did send a message off, and that message was relayed on to Washington. Can the JAG team learn why the message wasn't acted upon so many years ago, and at the same time prevent Riggins from salvaging the sub?
After being diagnosed with night blindness, Lt. Cmdr. Harmon Rabb, an F-14 Tomcat fighter pilot, is forced to change careers. Cmdr. Rabb chooses to join the Navy's Judge Advocate General (JAG) Corps. There he both defends and sometimes prosecutes Navy and Marine Corps defendants. He is sometimes assisted by fellow lawyer, Lt. Sarah "Mac" MacKenzie, and his other fellow JAG staff.
Many of Rabb's cases require him to both keep up his F-14 qualifications and travel the world, in order to bring justice to the cases he is trying.
Rabb must also deal with the fact that his father, also a former Navy pilot, never returned home after being held prisoner after he was shot down in North Vietnam. Rabb believing his father is still alive continues the search he has pursued to find his father, since his teens.