A group of the most prominent lawmen in the history of America go on tours to explore the courtrooms, their readiness, and the methods by which criminals get tried. The team attempts to monitor violations and abide by American law, selecting appropriate cases to defend.
Capt. John "Abe" Abraham and Capt. Maya Dobbins, based at Judge Advocate General Headquarters in Quantico, Virginia, get assigned to a case as prosecution and defense attorneys when a soldier in Afghanistan kills his commanding officer.
Three soldiers are killed when a Marine is accused of leaving his post in the middle of a battle. Maj. Trey Ferry has to resolve a diplomatic dispute, and Lt. Harper Li juggles her wedding preparations with her obligations to the Corps.
As a potential promotion-seeking female Marine may have been attacked as a result of leaked material, a woman thinks about calling Capt. Abraham to act as a witness in her lawsuit against the Marine Corps for her husband's untimely death.
Abe and Trey are tasked with bringing charges against the alleged murderer, a sitting US congressman, after a dying Marine admits to his role in covering up the death of an Iraqi civilian over ten years ago. Meanwhile, Maya assists her brother in getting ready for his state senate campaign.
Following the unintentional deaths of two Marines during a weapons test, Abe and Harper take on Trey as the prosecution and defense for the soldier suspected of interfering with the system. In addition, Col. Turnbull assigns Maya a serious task, and Abe assists Alex, the widow of his closest friend.
Abe and Harper use Marines to confront and expose civilians who are openly impersonating members of the Corps in an attempt to find the owner of a website encouraging violence. Rami experiences a moral crisis when he and his wife, Nazil, take their citizenship test. Abe's relationship with Alex gets more complex.
Colonel Turnbull is traveling to Germany to visit her injured son. Harper, Abe, and Maya are investigating a Marine who has been accused of desertion in Syria when they find themselves in the middle of a gunfight.
Abe and Harper go to Afghanistan to look into the death of an Afghan commander on a U.S. base. Trey and Maya go with their colleagues to defend a Marine accused of the murder in an on-base hearing.
When the main witness refuses to testify, Abe and Harper's investigation into the alleged wrongdoing of a Marine recruiter could come to a standstill.
Abe and Harper think they have a solid case when a Marine gets charged with aiding a terrorist in escaping from Guantanamo Bay. Still, they get inexplicably refused access to crucial evidence.
When Abe and Harper start to suspect a Marine was murdered, their investigation into his accidental overdose takes a different turn. Regarding testifying in a lawsuit against the Corps, Abe gets a warning. Maya worries about her sibling.
When Abe is detained and court-martialed for mutiny related to a 2010 mission in Afghanistan of which he was one of the few survivors, his fellow soldiers are forced to stand up for him and grudgingly pursue charges against him.