When a soldier in Afghanistan murders his commanding officer, Capt. John "Abe" Abraham and Capt. Maya Dobbins, working out of the Judge Advocate General Headquarters in Quantico, are assigned to the case as prosecution and defense lawyers.
A Marine is charged with abandoning his post during combat, resulting in the deaths of three soldiers; Maj. Trey Ferry must iron out a diplomatic spat; Lt. Harper Li works to balance her duties to the Corps with planning her wedding.
Leaked information may have led to an attack on a female Marine poised for a promotion; a woman is considering suing the Marine Corps for her husband's wrongful death and may ask Capt. Abraham to testify.
When a dying Marine confesses his involvement in covering up the murder of an Iraqi civilian more than a decade ago, Abe and Trey are assigned to prosecute the accused killer - a sitting U.S. congressman. Also, Maya helps her brother prepare for his state senate race.
When two Marines are accidentally killed in a weapons test, Abe and Harper square off against Trey as prosecution and defense for the soldier who is accused of tampering with the system. Also, Abe helps out his best friend's widow, Alex (Justine Cotsonas), and Col. Turnbull gives Maya an important assignment.
Abe and Harper try to track down a website owner who is inciting violence by having Marines confront and expose civilians who are publicly pretending to serve in the Corps. Also, Abe's relationship with Alex (Justine Cotsonas) becomes more complicated; Rami faces a crisis of conscience when he and his wife, Nazil (Shazi Raja), go for their citizenship test; and Col. Turnbull anxiously awaits word on her son's status after she approves an overseas airstrike.
Harper gets caught in a firefight when she, Abe and Maya travel to Syria to investigate a Marine accused of desertion. Also, Col. Turnbull travels to Germany to be with her wounded son, Adam (Derek Klena).
Abe and Harper travel to Afghanistan to investigate when an Afghan commander is killed on a U.S. base; when a Marine is accused of the crime, Trey and Maya join their colleagues to defend him in an on-base hearing.