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A jazz pianist named Shiro Tsuda returns from an overseas tour unwittingly carrying drugs that have been sewn into his jacket. When he stops by to see his girlfriend Kyoko, he walks in to find an unknown man attacking her. While struggling with the man, who is armed, Shiro accidentally shoots and kills her. The intruder knocks Shiro down and takes the drugs from Shiro's jacket. Shiro realizes that he was being used as a drag smuggler. He is sent to prison for three years for killing his girlfriiend. When he is released, he is determined to find out who set him up.