Republic of Korea 1% is a first-hand account of Lee Yu-Mi, a petty officer in the South Korean marines. She struggles to gain the respect of her teammates and her rival officers.

Republic of Korea 1% is a first-hand account of a female Marine's military life. Lee Yu-Mi is the first woman to pass the training. She is then forced toe deal with the struggle of leading a group of the worst performing soldiers in her company. She must work to gain their respect, as well face rival staff Sgt. Wang Jong-Pal, who attempts to interfere. But with the support of Sgt. Kang Cheol-In, Yu-Mi is able to begin final training with her teammates.—Chris Quigley

Yu-mi applies to a marine outfit to become their first female member. Finding out about their NO woman-policy, she pushes herself to the extreme and fills a petition. After overcoming many obstacles, she is finally accepted for her outstanding performance. However, conflicts never cease between sergeants and Yu-mi, who's new to the tradition and culture of the marines. Following the sudden death of a trainee, Sergeant HA, she is appointed to the head of the team. Highly motivated Yu-mi loses her troupe's trust after losing IBS. The team is in danger of dissolution due to the loss of a magazine.