Romance between "swordsmen," based on a true-life adventure of a young girl determined to be a part of history. In the 1860s in Japan, a new era is dawning. During this time fraught with violent social upheaval, samurai of all walks of life flock to Kyoto in the hope of joining a band of warriors united around their undying loyalty to the shogunate system. In time, this group would become one of the greatest (and most infamous) movements in Japanese history. the Shinsengumi! Posing as a man, Sei trains with the Shinsengumi and does her best to survive the turbulent times. Although she can see that former councilor Ito Koshitaro is manipulating the Shinsengumi for his own purposes, its leadership is slow to respond. Meanwhile, Nakamura Goro--an Ito sympathizer and hopeless romantic--takes it upon himself to try to "rescue" Sei! Unfortunately for Goro, a tender relationship has developed between Sei and Assistant Vice Captain Soji, the only Shinsengumi member who knows her secret!.