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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.