A young Englishwoman obsessed with an indecipherable past, Grey comes to Tokyo seeking a lost piece of film footage of the notorious 1937 Nanking Massacre, footage some say never existed. Only one man can help Grey. A survivor of the massacre, he is now a visiting professor at a university in Tokyo. But he will have nothing to do with her. So Grey accepts a job in an upmarket nightspot, where a certain gangster may be the key to gaining the professor's trust. An old man in a wheelchair surrounded by a terrifying entourage, the gangster is rumored to rely on a mysterious elixir for his continued health.