After a successful initial tour as a Marine rifleman, Lance Corporal Gracie Medicine Crow volunteers to become a scout-sniper, one of the deadliest—and most dangerous—military specialties in the United Federation Marine Corps. Gracie comes from the Apsáalooke Nation, a people with a long history of military tradition. Small in stature and considered stunningly beautiful, she is often underestimated, but that merely drives her to be the best sniper in the Corps. Driven by her need to excel, she tends to shut others out and focus on the mission at hand. But being a scout-sniper is far more than simple marksmanship. If she wants a career in the Corps, she must learn not only teamwork, but how to be a leader of Marines.