The year is 1863 and the story takes place in Kyoto. We follow a young man named Nyu, a kind and honest soul who cares about his family, but also has a hidden burning passion for justice. From the moment he encounters Toshizō Hijikata and Soji Okita, members of a hated ronin group known as the Miboro, his life takes a clearer path. Nyu, along with other men whose hearts are burning with courage and truth, advances toward an honest path with their blue wills emblazoned on their hearts.