Harm is sent to Washington, D.C., to join a committee formed to judge the validity of a shocking television report -- that U.S. forces used sarin gas on fellow Americans during the Gulf War. What he uncovers, though, is so unexpected that he can't present it without testimony from a key witness, Sgt. Morrison, who was actually on the mission in question in the Gulf, but has been missing ever since.

Meanwhile, Mac is caught off guard when an old flame, Christopher Ragle suddenly reappears in her life.

Mac is arrested and placed on trial for a major felony, along with her former commanding officer and mentor, Col. John Farrow. Conviction could result in long prison terms.

Harm volunteers to defend her, but his efforts are thwarted by Farrow's defense attorney, JAG exchange officer, Australian Navy Commander Mic Brumby. Harm feels that neither defendant has come clean with the truth and he begins to search for evidence which is not forthcoming from either one. Ultimately, he learns that Mac and Farrow have each been trying to protect the other. The key witness in the case turns out to be a major surprise to both defendants.