Tetsuro Suzuki developed AI technology to diagnose patients. He is a researcher at a medical center run by an IT company. The AI developed by Tetsuro receives a positive response because the machine is able to perform its task more efficiently compared to a human doctor. Shunpei Gamo is a representative of the IT company and he insists to make further progress on the AI technology. Naoko Arizono, who is president of the doctor's association, opposes that idea. Top Surgeon Chizuo Ueno is uncomfortable performing surgery diagnosed by AI. Around this time, a patient's condition worsens and he dies. The patient underwent surgery performed by Chizuo Ueno. Journalist Haruo Tachikawa learns that the patient diagnosed by AI has died and he investigates.