In order to end the Sengoku period and determine a ruler for the new era, on October 21, 1600, the Battle of Sekigahara takes place between the Western Army, led by Mitsunari Ishida, and the Eastern Army, led by Ieyasu Tokugawa, who attempts to keep a hold of the nation within his greedy grasp. Even though the Western Army are believed to outnumber the Eastern Army, they take losses on the battlefield. A hidden truth exists. Hatsume was sent to spy on Mitsunari Ishida but falls in love with him.