Kairo, one of the five kingdoms of the continent, declares war. It was announced that all aristocratic families must gather and send their armies in the name of their homeland. 

Roman, being a lone and famous warrior, decides to join the army of the eminent Lawrence family, whose heir and the army commander is known for his intelligence and also for his excellent swordsmanship. 

"I won't serve under a woman." Roman said when during the meeting he saw that the Lawrence heir is a woman.