幕末機關說

End of Edo Era - It was the time when long peaceful Tokugawa Dynasty began to be overshadowed triggered by the arrival of Westerners. During the upheaval, when youths were seeking for new age, there was an existence that brought turmoil and chaos. It was called Hasha no Kubi, or the Head of Conqueror. It was said that the person who could obtain the head could rule over the whole country.