During the Keicho era, the Toyotomi and Tokugawa factions were poised to fight at Sekigahara. Jirosaburo, a wandering warrior, stood beside Tokugawa Ieyasu as his loyal companion, guiding the troops. Jirosaburo and Ieyasu were so alike that only a cunning assassin could distinguish between them. Following Ieyasu's murder, Jirosaburo abandoned his own identity and adopted Ieyasu's goal of conquering and unifying.