After seeing him at Kreutzer's hospital, Black Jack goes after Dr. Stein, a major leading expert on prosthetic limbs and organ transplants. Black Jack also encounters a woman whom he was familiar with. He discovers that Stein was about to perform an operation that would attach an experimental robotic arm to an aspiring pianist. Black Jack fails to get any answers from Dr. Stein, but does talk to the boy who was about to receive the robotic arm. Black Jack talks to the boy that was about to receive the new arm. The boy admits that he didn't want the robotic arm which would enable him to play the piano with simple thought but would rather keep his human arm and learn to play the hard way. Black Jack saves the boys arm, and then attempts to follow Dr. Stein to England.