Hanpeita Takeichi, a samurai, finds that he has travelled through time to modern-day Japan. He's taken in by an old man who runs a cram school, and begins to work as a teacher there.
Young wife Sakiko is arrested for the murder of her husband. Despite her claim of innocence, that claim is not heard. Sakiko escapes and chases the real criminal who killed her husband. Her only clue is a sight of a tattoo on the murderers back. Sakiko hides in the city at night to find the real culprit. Offering her body to see the back of the men she seeks out, Sakiko must uncover the truth to the murder of her husband before it is too late.
Shun is a third generation descendant of a Japanese orphan left behind in China during World War II. Takeru is a lonely and reckless young man whose family was murdered when he was a child. Shun, Takeru and Kasumi, who has an equally troubled past and background, become collaborators after being hired by Kuchinawa in a police undercover operation to take on a drug cartel in a Chinatown. The drama follows their ability to work together and grow individually.
